Hexasterophora
六放海绵亚纲
🗣️ 情景例句
There are lots of places to go,
有很多地方要去，
She looks so pale, she must be ill.
她脸色很苍白，一定病了。
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。