Nitriding steel
[机] 氮化钢
🧩 词语组成解析
v. 渗氮
steel
[stil]
n. 钢，钢铁;钢制品;兵器;钢铁工业;
vt. 包上或镀上钢;使坚定;
adj. 钢制的;钢铁业的;坚强的;[色彩]青灰色的;
🗣️ 情景例句
worrying about him.
为他操心。
We've got to get a sofa and a chair for the living room.
我们必须有一张沙发和椅子放在客厅。
What do the farmers do with your machines?
农民用机器做什么呢？