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
And thanks for the directions.
谢谢你给我指了路。
Idle young, needy old.
少壮不努力，老大徒伤悲。
Where does the teacher stand?
老师站在哪里？