🗣️ 情景例句
Never go swimming on a full stomach.
吃饱饭后不要游泳。
He knows it's inconvenient ,but he wants to go anyway.
他知道是不方便，但是他不管怎样想要去。
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）