🗣️ 情景例句
You're right, Ellen.
你说得对， Ellen。
How can I get in touch with you?
我要怎样联络你呢？
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）