Chernikite
钽钨钛钙石
🗣️ 情景例句
Maybe you can photogragh a class,
也许你来拍一次上课的情形，
No, I can't go to bed till she says Good night to me.
不，除非她向我道晚安，不然我睡不着。
How many instruments do you play?
你能演奏多少种乐器？