water vapour maser

例句：

1. 1. The water vapour in the air was so thick that it made it hard to breathe.
   空气中的水蒸气太浓了，以至于呼吸都变得困难。
2. 2. The microwave oven uses radio waves to heat food quickly.
   微波炉使用无线电波快速加热食物。
3. 3. The water vapour from the rainforest is a major source of humidity in the region.
   雨林中的水蒸气是该地区湿度的主要来源。