Comprehensions
n. 理解, 理解力( comprehension的复数形式 ); （语言学习中的）理解练习（或训练）
🗣️ 情景例句
I don't see why she's so against the idea.
我不明白她为何如此反对这个计划。
To sing a song
唱歌
A sound made by tapping on the hull of a ship will be reflected from the sea bottom,
敲打船体所发了的声音会从海底传回来，