Polypeptin
[医] 圈杆菌素, 环[状]杆菌素, 多肽菌素
🗣️ 情景例句
I'm sorry, I can't help you. I'm just a tourist also.
很抱歉，我帮不了你，我也只是个游客。
Why are you sitting over there?
你为什么坐在那里？
Is that bag heavy, Penny?
那个提包重吗，彭妮？