Schaffer's acid
[机] 谢佛酸
🧩 词语组成解析
🗣️ 情景例句
I can let you go, as long as you can finish this task by the deadline.
我可让你走，只要你在最后的限期前完成任务。
What would you like to eat?
你要吃些什么？
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）