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
When was your last complete physical?
上一次全身检查是什么时候？
You've done me a great favour.
您帮了我大忙。
The figure seems all Right.
数目看起来是对的。