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vi. to shake slightly because you are cold, frightened, excited, etc.
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a. not studying or looking at sth. thoroughly; seeing only what is obvious; appearing to be true, real or important until you look at it more carefully
n. a form of air pollution that is or looks like a mixture of smoke and fog, especially in cities
v. to begin sth. again after a pause or an interruption
n. Einstein's theory of the universe based on the principle that all movement is relative and that time is a fourth dimension related to space
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