Nitempering
气体软氮化; 氮回火
🗣️ 情景例句
And perhaps, you'll join us?
也许你能跟我们一起去
A lion at home, a mouse abroad.
在家凶如狮，在外却如鼠。
I've lost my science book. Have you seen it anywhere?
我的自然科学书丢了。你在哪看见了吗？