Clouds are formations of condensed water vapour.

云是由凝聚水蒸气构。

His brain was clouded by vapours and dreams.

脑子里充满空和梦幻。

According to the engineering thermodynamic theory,the inflating work and ebulliency work exerted by the materials composed of liquid,vapour and gas during the adiabatic process are calculated.

运用工程热力学理论计算组物料各气体、体、液体于绝热过程中对外所作膨胀功、爆沸功。