Copper refining
[建] 铜(之)精炼
🧩 词语组成解析
copper
['kɑpɚ]
n. 铜;铜币;紫铜色;警察;
adj. 铜制的;
vt. 镀铜;
[计] 精炼, 提纯\\n[化] 精炼; 精制; 提炼; 匀料; 匀浆
🗣️ 情景例句
Yes, they are. We're still expanding.
是的，我们还要扩建。
I'm really sorry about it.
我真是非常抱歉。
By this time her legs were beginning to tremble,
这时她两腿累得开始发抖，