vapour head

例句：

1. 1. The hot air evaporated quickly in the summer sun.
   夏天的阳光下，热空气很快蒸发了。
2. 2.The scientist observed the vapour rising from the lake surface.
   科学家观察到湖面上升起的水蒸气。
3. 3.The vapour was so dense that it obscured the moon's light.
   水蒸气如此密集，以至于遮蔽了月亮的光芒。