Epigenite
砷硫铜铁矿
🗣️ 情景例句
Typing is easy once you get the hang of it.
一旦你掌握诀窍，打字就很简单。
It's a beautiful country with scenic mountain areas.
这个国家很美，它有很多景色宜人的山区。
Recently the New York Animal Medical Center made a study of 132 cats over a period of five months.
最近，纽约动物医疗中心对132只猫进行了为期5个月的综合研究。