Fervanite
水钒铁矿
🗣️ 情景例句
The longer the words the better.
单词越长越好。
The phone seems to be out of order.
电话好像出故障了。
So was born the echo-sounding apparatus, now in general use in ships.
这样就产生了目前各种船舶上普遍应用的回声探测仪。