Plexglass
安全玻璃
🗣️ 情景例句
What did you do?
那你怎么办呢？
Sorry, they are already full.
抱歉，全部满了。
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）