Baumhauerite
褐硫砷铅矿
🗣️ 情景例句
If you don't finish your homework, you'll be in big, big trouble.
如果你不完成作业，你就有大麻烦了。
After that, what happened to him?
在那之后，发生了什么事情？
Up to now, historians have assumed that calendars came into being with the advent of agriculture, for then man was faced with a real need to understand something about the seasons.
历史学家迄今认为日历是随农业的问世而出现的，因为当时人们面临着了解四季的实际需要，