题目内容
adj. involving using the hands or physical strength; n. a book that tells you how to do or operate sth., especially one that comes with a machine, etc., when you buy it
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n. An idea that is communicated indirectly, through a suggestion or hint
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n. the interplay that occurs when the effect of one factor depends on another factor
n. a piece of paper, etc.. that is attached to sth. and that gives information about it;
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