Copper stain test
[化] 铜片试验
🧩 词语组成解析
copper
['kɑpɚ]
n. 铜;铜币;紫铜色;警察;
adj. 铜制的;
vt. 镀铜;
🗣️ 情景例句
Please, use the phone.
请打吧。
Would you like to leave your name?
你想要留下你的名字吗？
There is no one but hopes to be rich.
没有人不想发财。