Malcomising
不锈钢表面氮化; 氮化热处理
🗣️ 情景例句
OK.
好。
I did composition last month.
我上个月做作文。
The only passengers, a young woman and her two baby daughters, were unhurt.
机上仅有的乘客，一位年轻的妇女和她的两个女婴却平安无事。