Fluorapatite
[医] 氟磷灰石
🗣️ 情景例句
Come on in, everybody.
大家请进来。
I'd say yor're about twenty-three.
我猜你大约23岁。
These satellites go round the earth and help us to learn more about the earth, the weather and other things.
这些卫星绕着地球转，帮助我们更好地了解地球、天气和其他情况。