Nitrocementation
碳氮共渗
🗣️ 情景例句
Yes, he makes house calls, but the doctor has an opening only after 2:00 p.m.
好，他愿出诊，但他在下午2点后才有空。
I apologize for that, sir.
请您原谅。
She won't have any trouble.
对她不会有什么困难的。