题目内容
n. the interplay that occurs when the effect of one factor depends on another factor
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n. a piece of paper, etc.. that is attached to sth. and that gives information about it;
n. a cover over a container that can be removed or opened by turning it or lifting it
adj. based on the meter as a standard of measurement;
adj. having more than a basic knowledge of sth. but not yet advanced;
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