Precarburization
预先碳化[渗碳]
🗣️ 情景例句
China is implementing a family planning policy.
中了在实施计划生育政策。
I'm a genius, aren't I?
我是个天才啊。
they would devour all our crops and kill our flocks and herds, if it were not for the protection we get from insect-eating animals.
昆虫会吞食我们的全部庄稼，杀死我们的成群的牛羊。