Powellites
(powellite 的复数) 钼钨钙矿
🗣️ 情景例句
Sure.
当然记得。
A great ship asks deep waters.
大船要走深水，蛟龙要在海中游。
It has never been explained why university students seem to enjoy practical jokes more than else.
谁也弄不清为什么大学生好像比任何人都更喜欢恶作剧。