Scheelitine
钨铅矿
🗣️ 情景例句
I expect you to be punctual.
我希望你守时。
There is a black sheep in every flock.
群群羊中有黑羊。
It is bacteria that have generated the oxygen we breathe on earth.
正是细菌生产出我们在地球上呼吸的氧气。