Classfication
分类
🗣️ 情景例句
In a word, we'll provide you with all good service.
我们将为你们提供最好的服务。
Don't put off till tomorrow what should be done today.
今日事，今日毕。
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）