Calcimangite
锰方解石
🗣️ 情景例句
Save your voices.
留着点嗓子。
I have a dog, but it's very quiet.
我有一只狗，不过它很安静。
And anyone who gave more than a passing thought to the bottom confines of the oceans probably assumed that the sea bed was flat.
凡是稍稍想过大海海底的人大概都会认为海底是平坦的。