Pbi
[医] 蛋白结合碘
🗣️ 情景例句
I need to post a letter.
我得去寄封信。
We know not what is good until we have lost it.
有的时候不爱惜，失了以后空叹息。
How can I get there? I don't know the way.
去那儿怎么走？我不认得路。