Coppering
[建] 镀铜
🗣️ 情景例句
Yes. I do.
是的， 我有疑虑。
He's concentrating on learning English.
他集中精力学英语。
It was necessary, therefore, to invent instruments that neither slumbered nor slept.
因此，有必要发明一种仪器，既不打盹儿，也不睡觉。