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
Please have your customs declaration form ready.
请把您的申报表准备好。
How I wish the vacation would last longer!
如果假期长一点那该多好。
Yes.
看见了。