Ethylating
乙基化(的)
🗣️ 情景例句
Yes. I'm sorry, but how do you spell your last name, sir?
好的，不过对不起，先生你的姓怎么拼？
How often did I tell you not to say a word?
我告诉你多少次不要讲话?
Yes, he's on the phone. Is he expecting you?
在家，他在打电话。他是在等你吗？