Nitempering
气体软氮化; 氮回火
🗣️ 情景例句
A credit card is very useful when you go traveling.
当然旅游的时候，信用卡很有用。
The scent of roses is wonderful.
玫瑰的芳香非常棒！
The development of films with sound became a problem for Chaplin.
有声电影的研制对卓别林来说就成了问题。