Polyampholyte
聚两性电解质
🗣️ 情景例句
We have to go pick up Michelle.
我们得去接 Michelle了。
Didn't I tell you before?
我不是告诉过你吗？
Just a minute. I'll see if I'm free. No, I'm not. I've already got something on that evening.
等一会。我看看是否有空。不，我没空。我那天晚上已经有了安排。