Spodiosite
氟磷钙石
🗣️ 情景例句
Thanks. Thanks a lot. Good-bye.
谢谢。非常感谢。再见。
I often do home work in the afternoon.
我常常在下午做功课。
The problem now facing humanity is: What is going to be done with all this knowledge?
用这些知识去做什么？