Bookbinding
n. 装订
✅ 同义词
🗣️ 情景例句
We know.
我们知道。
Mettle is dangerous in a blind horse.
瞎马鼓勇气，正是危险事。
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）