Hss
abbr. high-speed steel 高速钢
🗣️ 情景例句
My instructor thought that the beginner's class was too easy for me.
老师认为初级课程对我来说太容易了。
What is the color of your new book?
你的新书是什么颜色的？
Unfortunately you'll have to pay the fine before you check those books out.
在你借书之前你要先付清罚款。