Aregenerative
[医] 再生障碍[性]的
🗣️ 情景例句
Practice tenses as much as possible.
操练各种时态。
When would you like to leave?
你要什么时间离开呢？
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，