Powellite
钼钨钙矿
🗣️ 情景例句
But I've never had the pleasure of doing any business with you.
可是同贵公司尚无业务往来。
The Hilton hotel, please. I have a 10:30 appointment.
请到希尔顿旅馆，十点半我有一个约会。
I don't know. I can't see!
我不知道，我看不见。