Hesitating
a. 犹豫的
🗣️ 情景例句
I'm going back to my office.
我要回办公室了。
I don't know where I've seen him before.
我不晓得在哪儿见过他。
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低点）、浪高（从波谷到浪峰的垂直距离）