Sulfonitriding
硫氮共渗
🗣️ 情景例句
Thank you very much for preparing such a splendid dinner specially for me.
谢谢您为我特意准备如此丰盛的晚餐。
How did you get so dirty?
你为什么弄得这么脏？
Good morning, class.
同学们，早上好。