Fleischerite
纤锌矿
🗣️ 情景例句
I've been thinking a lot about our responsibilities
我对于我们的职责想了很多
We are supposed to help each other.
我们理应彼此帮助。
To escape from the Earth in a rocket, one must travel at seven miles per second.
要乘坐一枚火箭飞离地球，火箭的速度要达到每秒7英里，