Nitrocolors
含硝基生色料团化合物
🗣️ 情景例句
and he's very unhappy about not working.
他对没有工作感到怏怏不乐。
To have teeth pulled
拔牙
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）