短語詞組短語gas dust cloud 氣體塵埃云gas circulation cloud 氣泡暈gas blanketing cloud 氣體云blast gas cloud 爆炸氣體云;爆破氣體云turbulent gas cloud theory 渦動氣云說mustard -gas cloud 芥子氣云gas cloud harvestor 氣云采集器unconfined gas cloud explosions 開敞空間可燃氣云爆炸 返回 gas cloud