Botryogen
[矿]赤铁矾
🗣️ 情景例句
I think I've had enough of that sandwich.
我想我已经吃够了三明治。
My raincoat is purple.
我的雨衣是紫色的。
It was the idea of supporting a craft on a 'pad',or cushion, of low-pressure air, ringed with a curtain of higher pressure air.
用一个气垫来支撑船体，低压空或软垫，软垫周围用高压空气环绕。