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.是什么意思_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.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句