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empezar lección
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a section at the end of the book that gives extra information
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empezar lección
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without a covering: exposed
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empezar lección
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hands that have nothing covering them
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empezar lección
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the glass part that fits into an electric lamp, etc. to give light when it is switched on
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empezar lección
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a set of wires, covered in plastic or rubber, that carries electricity, telephone signals, etc... OR a strong, thick metal rope
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empezar lección
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indicates the possibility of personal injury or damage to equipment
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empezar lección
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a tool used for holding or fastening two things together firmly
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empezar lección
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empezar lección
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a result or effect of something that has happened
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empezar lección
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to make something dirty, polluted, impure, or poisonous by adding a substance that is dangerous or carries disease
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empezar lección
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a substance that makes something impure
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empezar lección
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an electrical wire that connects a machine or tool to the main supply of electricity OR strong, thick string
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empezar lección
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to gradually destroy something by a chemical reaction
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empezar lección
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the damage caused to metals by a chemical reaction
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empezar lección
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the strong possibility of immediate death or permanent injury.
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empezar lección
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to become worse or lower in quality as time passes
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empezar lección
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empezar lección
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causing or ending in death
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empezar lección
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a picture, diagram, chart, or drawing in a manual that is referred to by a number
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empezar lección
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smoke, gas, or something similar that smells strongly or that is dangerous to breathe in
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empezar lección
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to pay careful attention to someone's advice or warning
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empezar lección
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an alphabetical listing of topics at the back of a book that shows the pages on which they are mentioned
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empezar lección
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empezar lección
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empezar lección
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to make something begin or start to operate
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empezar lección
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the act of making something start
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empezar lección
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able to kill someone: deadly
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empezar lección
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not capable of causing death
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empezar lección
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to put an oily or greasy substance on surfaces or parts to help them move more smoothly and reduce friction
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empezar lección
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empezar lección
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to limit the size, amount, or movement of something
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empezar lección
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a rule, action, or situation that limits or controls something or someone
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empezar lección
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empezar lección
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empezar lección
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to suddenly break into very small pieces
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empezar lección
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the part of a machine or piece of equipment that opens and closes in order to control the flow of air or liquid
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empezar lección
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a substance that is in the form of a gas
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empezar lección
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empezar lección
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to allow fresh air to enter and move around a room, building, etc.
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empezar lección
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the movement of fresh air around a room or building
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empezar lección
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indicates the possibility of immediate personal injury or damage to equipment
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empezar lección
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something that causes a reaction or change
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empezar lección
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to bring components or parts into the proper position or into a straight line.
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empezar lección
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the arrangement of parts in a straight line or in the proper position
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empezar lección
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a long, round piece of metal that has a wider part at one end and looks like a screw at the other end
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empezar lección
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a group of things, people, or events that are similar in some way
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empezar lección
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to group things, people, or events according to similarities
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empezar lección
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a group into which things or people are put because of the features they have in common
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empezar lección
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to put things, people, or events into groups based on the way they are alike
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empezar lección
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in a way that is the opposite of something else
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empezar lección
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increasing or becoming better or worse as a result of more and more
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empezar lección
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a repeating series of events or actions
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empezar lección
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the measurement of an object by length, width, and/or height
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empezar lección
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separate and different in a way that is clear
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empezar lección
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the difference between two things
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empezar lección
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to recognize the differences between things
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empezar lección
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an abbreviation that means "for example"
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empezar lección
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an abbreviation that means "that is"-- used to explain a preceding statement more fully
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empezar lección
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a way of doing something or of achieving a desired result
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empezar lección
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a piece of metal with a hole through it so that it can be screwed onto a bolt or screw
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empezar lección
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a nut that has two parts that stick out at the sides so that you can turn it easily by using your fingers
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empezar lección
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a small hole made by a sharp pointed object
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empezar lección
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a supply of something that is available for use
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empezar lección
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to separate a liquid from solid pieces
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empezar lección
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a device used to separate a liquid from solid pieces
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empezar lección
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a particular kind of material
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empezar lección
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to move back and forth or from side to side with very short, quick movements
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empezar lección
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a continuous slight shaking movement that can either be back and forth or side to side
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empezar lección
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extremely important, critical
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empezar lección
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used to make a statement that describes how two people, groups, etc. are different
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empezar lección
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an area or spot that has been damaged by scraping, rubbing, or grinding
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empezar lección
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the amount of space a flat surface covers
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empezar lección
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having a rough texture: consisting of large or thick particles
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empezar lección
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to change from one system or method to another
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empezar lección
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the process of changing from one system or method to another
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empezar lección
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to discover or notice the presence of something, especially something that is not easy to see or hear
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empezar lección
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the act of discovering or the fact of being discovered
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empezar lección
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able to be noticed or discovered
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empezar lección
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made up of very small pieces: having a smooth texture: very thin and narrow, not thick and heavy
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empezar lección
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the act or effect of rubbing one object against another
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empezar lección
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for this reason: as a result: therefore
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empezar lección
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to stop working properly because something inside stops moving: to become stuck
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empezar lección
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a small cut on the surface of something
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empezar lección
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to go out in all directions from a central point
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empezar lección
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to force (something) to move away or apart
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empezar lección
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to increase a number to one that is less exact but more convenient to use
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empezar lección
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to lower a number to one that is less exact but more convenient to use
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empezar lección
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an electric charge, often produced by friction, that collects on the surface of something and can cause a mild shock
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empezar lección
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empezar lección
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to send an electronic signal, a radio or television broadcast, etc.
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empezar lección
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a piece of equipment used for sending electronic signals, especially radio, television, or telephone signals
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empezar lección
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the process of sending out electronic signals, or a signal sent out in this way
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empezar lección
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the amount of space something fills, or the amount of space in a container
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empezar lección
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to block something such as a pipe, tube, or passage
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empezar lección
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extremely important because it will affect other things
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empezar lección
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to remove liquid from something by letting it flow away or out
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empezar lección
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a broken part or small piece of something
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empezar lección
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extremely important or essential
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empezar lección
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empezar lección
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to regularly watch, listen to, or check something (or someone) in order to find out what is happening
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pounds per square inch (psi) empezar lección
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a measure of pressure that a liquid or gas exerts (forcefully applies) on the walls of its container
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empezar lección
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protected from or not damaged by
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revolutions per minute (rpm) empezar lección
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a measurement of how many times a rotating object turns in one minute
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empezar lección
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a liquid that contains a mixture of two or more substances
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empezar lección
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to make something wet by making a liquid fall on it
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empezar lección
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carried out completely and with great attention to detail
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empezar lección
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to have the food and liquid that is in your stomach come out through your mouth because you are sick
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