Trichalcite
丝砷铜矿
🗣️ 情景例句
Attending school is compulsory in this country.
这国家衽的是义务教育。
Health and understanding are the two great blessing of life.
健康和融洽是人生两大幸事。
I had left it on a chair beside the door and now it wasn't there!
我曾把它放在门边的椅子上，可这会儿不见了！