Barthite
砷锌铜矿
🗣️ 情景例句
I would like to improve my English pronunciation.
我想改善我的英语发音。
Experience keeps a dear school, but fools learn in no other.
吃亏学乖代价高，笨汉非此学不好。
Yes, it is. Why don't you take off your sweater?
是啊，你何不脱了羊毛衫呢？