Precarburization
预先碳化[渗碳]
🗣️ 情景例句
Did you bring your transcript from high school?
你把高中的成绩单带来了吗？
The old lady takes delight in visits from her grandchildren.
那个老妇人以孙辈门看她来为乐。
And then quickly and quietly we did just that.
于是，我们就迅速而且悄悄地干了起来。