重水

例句：

1. 1. He was given a special diet to help him recover from his illness.
   他被给予了一种特殊的饮食来帮助他恢复健康。
2. 2.The heavy water is used in the production of nuclear energy.
   重水用于核能的生产。
3. 3. The scientists found that the heavy water had changed the properties of the crystals.
   科学家们发现重水改变了晶体的性质。