Baumhauerite
褐硫砷铅矿
🗣️ 情景例句
May I take a picture of you and your little boy?
我可以替你和你的小男孩拍一张照吗？
Every advantage has its disadvantage.
有利必有弊。
The first records the arrival of longitudinal vibrations.
首先记录下的是纵向波的到达；