Mercaptalation
缩硫醛化作用
🗣️ 情景例句
How does she get by on such a small salary?
她靠那么一点薪水怎么过生活？
If the old dog barks, he gives counsel.
如果老狗叫，他是给忠告。
Two return tickets to London,please.
买两张到伦敦的往返票。