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main (driving) screw的英文翻譯是什么意思，詞典釋義與在線(xiàn)翻譯：
英英釋義
名詞 main:
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any very large body of (salt) water
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a principal pipe in a system that distributes water or gas or electricity or that collects sewage
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most important element
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(of a clause) capable of standing syntactically alone as a complete sentence
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of force; of the greatest possible intensity
