Diamondite
赛金刚石合金; 碳化钨合金
🗣️ 情景例句
Yes, sir.
是的 ，先生。
What shall I send him for his birthday?
我要送他什么东西作为生日礼物？
In a few days I was learning and enjoying it like any child.
几天之后，我像一个孩子那样学习起来--而且学得很开心。