liquid heater

例句：

1. 1. The liquidheater in the kitchen keeps the room warm during winter.
   厨房里的液体加热器在冬天保持房间温暖。
2. 2. The liquid heater is easy to install and maintain.
   液体加热器安装和保养都很容易。
3. 3. When the liquid heater fails, it's important to have a backup heating source.
   当液体加热器失效时，重要的是要有备用的加热源。