Graftonite
钙磷铁锰矿
🗣️ 情景例句
Now what?
又怎么了？
I'm cleaning the yard outside.
我在外面清理庭院。
If there had not been a hard layer of rock beneath the soil, they would have completed the job in a few hours.
如果不是因为土壤下面有一层坚硬的岩石，他们的营救工作仅用几个小时就可以完成了。