Ecoengineering
[化] 生态工程
🗣️ 情景例句
Certainly sir, and is there anything else I can do for you?
当然了，先生，请问还有什么我能为你效劳呢？
What were you doing when I called you on the telephone?
当我打电话给了你时，你正在做什么？
I'm from Canada.
我是加拿大人。