Hydrodynamics
n. 流体力学, 水动力学\\n[化] 流体动力学
🗣️ 情景例句
I reminded him to work hand.
我提醒他要用功。
I would like to go to school, Do you want to go, too?
我要去学校，你是不是也要去？
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，