mainspring
英
['meɪnsprɪŋ]
美
['meɪnsprɪŋ]
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Noun:
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the most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism
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用作名词 (n.)
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The mainspring of the mechanism would remain unchanged.
这一机制的主要推动力依然不会改变。
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海词词典,十七年品牌