Word Frequency
mainspring
(ˈmeɪnˌsprɪŋ)
noun
1.
the principal power spring of a mechanism, esp in a watch or clock
2.
the chief cause or motive of something
| 单词 | mainspring |
| 释义 | Word Frequency mainspring(ˈmeɪnˌsprɪŋ) noun 1. the principal power spring of a mechanism, esp in a watch or clock 2. the chief cause or motive of something |
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