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
It's time I was off.
我该走了。
You are still thinking about a Ph.D., aren't you?
你还是想学成博士，是吗？
I'm very proud of you.
我为你感到非常骄傲。