“水蒸汽”的英语？

水蒸汽触及冷的表面即凝结成水.Steam is condensed to water when it touches a cold surface.在这座古老的热水锅炉产生的水蒸汽中隐隐约约可以看到那个男仆的影子.The butler was almost invisible in the stream of an antiquated geyser.热空气要较冷空气容纳更多的水蒸汽.Warm air can contain more ...