Ionicnitriding
离子氮化
🗣️ 情景例句
And I am a hard worker when I have something challenging to do.
并且在遇到挑战性的工作时，我是个很努力的人。
He has a writig brush.
他有一支毛笔。
Mum, I don't feel very well.
妈，我感觉不舒服。