domestic hot-water heater

例句：

1. 1. We decidedto buy a new domestic hot-waterheater for our new house.
   我们决定为我们的新房子买一台新的家用热水加热器。
2. 2.The new domestic hot-water heater ismore energy efficient than the old one.
   这台新的家用热水加热器比旧的更节能。
3. 3. The family was very happy withthe new domestic hot-water heater theybought.
   这个家庭对他们买的新家用热水加热器非常满意。