Precarburization
预先碳化[渗碳]
🗣️ 情景例句
But when do they do it?
但是什么时候动手术？
Do you like dogs?
你喜欢狗？
Hardly anyone can positively enjoy sitting in a train for more than a few hours.
很少有人能够真正喜欢坐几个小时以上的火车。