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
If my GPA isn't high enough I can't play any sports.
如果我的平均学分不够高，我就不能再参加体育活动了。
A good heart conquers ill fortune.
善心克厄运。
He then asked me how my brother was and whether I liked my new job in London.
接着他又问我的兄弟近来如何，问我是否喜欢伦敦的新工作。