Vacillate between
在…之间动摇不定
🧩 词语组成解析
between
[bɪ'twin]
prep. 在…之间;私下，暗中;在…中任择其一;来往于…之间;
adv. 当中，中间;
🗣️ 情景例句
Can you assist me in this matter?
这件事您能帮助我吗？
He that dallies with enemy gives him leave to kill him.
把敌人看儿戏，无异于准许敌人杀害自己。
I can't type this letter.
我打不了这封信。