Antisubstance
[医] 抗体
🗣️ 情景例句
She is a wonderful mother.
她是个了不起的母亲。
If you're not sure how to do is, ask me.
假如你拿不准怎样做，就来问我好了。
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，