Formanite
钽钇铌矿
🗣️ 情景例句
We hired a woman to watch Richard and then Susan,
我们雇用一名女士来照顾Richard ，后来又照顾Susan
I'd like to know something about your foreign trade policy.
我非常想了解有关贵国对外贸易的政策。
What colour is it?
什么颜色的？