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
She's been sneaking around on her husband.
她一直在欺骗她的丈夫。
In college I majored in math, What was your major?
大学时我主修数学，你主修什么呢？
I think there is a possible problem if you tell the manager about the thief.
我想，如果你向经理告发这个窃贼，可能存在这样一个问题。