Precarburization
预先碳化[渗碳]
🗣️ 情景例句
Is Robbie Stewart there?
Robbie Stewart在吗？
He is a promising young man.
他是个有出息的年轻人。[分词作定语]
Good, I'll see you there at 12:30.
好的，十二点我会在那儿与你碰面。