Powellite
钼钨钙矿
🗣️ 情景例句
May I see the mirror, please?
我可以照照镜子吗？
We've increased our efficiency by 20% through automation.
通过自动化我们的效率增加了20%。
David Hall,83, Bridge Street.
大卫。霍尔，大桥街83号。