Ab.
[医] 抗体
🗣️ 情景例句
There are, Ellen.
一定有， Ellen。
He who makes constant complaint gets little compassion.
经常诉苦抱怨，难以博得同情。
The man had connected the air-line to a supply line of oxygen, not compressed air.
这个工人把供气管接到了氧气供应管上，而不是接到压缩空气管上。