Cistine
氨基酸
🗣️ 情景例句
He has had various experiences in his life.
他的生活经验丰富。
I have no other choice.
我别无选择。
Another man lit a cigarette but it burnt strangely and so he too put it out.
另一个工人点燃一支烟，但烟燃得怪怪的，于是他也把烟灭了。