Cys
[化] 半胱氨酸
🗣️ 情景例句
You have to ask for my father's permission.
你必须征得我父亲的同意。
I guess he's about 30.
我猜他大概30岁。
As the play draws to its close, they wonder whether they will ever catch that last train home.
当戏快演完时，他们又为是否能赶上末班火车回家而犯愁。