hot-water heater

例句：

1. 1.We need to install a hot-water heater in our kitchen.
   我们需要在我们的厨房安装一个热水加热器。
2. 2.The hot-water heater is the main source of heat in a bathroom.
   热水加热器是浴室的主要热源。
3. 3.The hot-water heater needs to be regularly maintained to ensure its efficiency.
   热水加热器需要定期维护以确保其效率。