Sauconite
[矿]锌蒙脱石, 羟锌矿
🗣️ 情景例句
It's an album of pictures of the United States:
是关于美国的
That's a tough question to answer.
那是一个很难回答的问题。
This is done by a great number of ring-shaped air jets on the bottom of the craft.
船底装上大量环状喷气嘴以实现这一目的。