Schalfnerite
铜钒铅锌矿
🗣️ 情景例句
I speak the Shanghai dialect and the Mandarin.
我会讲上海话，普通话。
The fire is the test of gold; adversity of strong man.
烈火试真金，困苦练壮士。
I have to raise some issues which may be embarrassing.
我必须提出一些比较尴尬的问题。