Plumbonacrite
水白铅矿
🗣️ 情景例句
Yes, I remember. You were a great help.
是的， 我记得。你帮了个大忙。
No man is the worst for knowing the worst of himself.
没有一个人因为他自知最糟就是最糟。
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）