Jacobsite
锰尖晶石
🗣️ 情景例句
I think aerobics is easy.
我觉得有氧运动很容易。
Joy shared with others are more enjoyed.
与人同乐，其乐无穷。
They then knew that they had discovered the cause of the fire.
这时调查人员知道他们找到了发生火灾的原因了。