mainspring
US /ˈmeɪn.sprɪŋ/
UK /ˈmeɪn.sprɪŋ/
名词
1.
主发条
the most important reason for something; the thing that makes something else happen:
示例:
•
Work was the mainspring of his life.
在 Lingoland 学习这个单词
主发条
the most important reason for something; the thing that makes something else happen: