Hydrodynamics
n. 流体力学, 水动力学\\n[化] 流体动力学
🗣️ 情景例句
having to take care of the baby all weekend.
整个周末照顾孩子。
You are just trying to save face.
你只是想挽回面子。
When will the train leave?
火车什么时候开？