Carburizing
[机] 渗碳
🗣️ 情景例句
I need to post a letter.
我得去寄封信。
A little child is the sweetest and purest thing in the world.
幼儿是世界上最可爱和最纯洁的。
I'd like to invite you to dinner before you go. What about Thursday?
我想在你走之前请你吃饭。周四怎么样？