adj.蒸气多的,冒出蒸气的
A cloud is a condensation of water vapour in the atmosphere.
云是由大气中的水蒸气凝结成的.
A cloud is a mass of vapour in the sky.
云是天空中的水汽团块.
Clouds are formations of condensed water vapour.
云是由凝聚的水蒸气构成的.