题目内容
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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v. to obtain sth. , especially sth. good, as a direct result of sth. that you have done; to cut and collect a crop, especially wheat, from a field
vt. to remove or reduce an unpleasant feeling or pain
a. far away from places where other people live
a. not done, seen, happening, etc. very often
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