🗣️ 情景例句
There's so much for young people to see and do.
这里有很多可供年轻人看和做的事情。
I have confidence in myself.
我对自己颇具信心。
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）