Davidite
铀钛磁铁矿, 铈铀钛铁矿
🗣️ 情景例句
I Wonder whether they will arrive on time.
我也不知道他能不能准时到。
I'm two years younger than my sister.
我比我姐小两岁。
It's a frisby. Do you want a go?
是frisby（飞盘）。你想试试吗？