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
It is likely to rain tonight.
今晚可能会下雨。
Do I need a reservation for the dining car?
我需要预订餐车吗？
Did the material work out well for you?
那些材料进行的顺利吗？