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
but I really enjoy it.
但我确实乐在工作。
What do you do in your spare time?
空闲时间你干什么？
Mother doesn't make up.
妈妈不化妆。