广播电视英语短句 第 1 课：太阳能热水器-4

When the water heater is working correctly, water will flow from the storage tank to the collector and back again. 当这个热水器工作正常时，水会来回的在集热器和水箱间流动。

You can use the hot water at the top of the tank for washing and cleaning. 你可以使用水箱顶部的热水来洗洗刷刷。

You can change the flow of water so that the temperature is hot or warm as desired. 也可以通过改变水的流程来调节你满意的水温。

This solar water heater is easy to build and operate. 太阳能热水器的安装方便，使用简单。

It will last about two years before the rubber pipes need to be replaced. 两根橡皮管的使用寿命为两年。

There is also something else you will need to make the solar water heater work -- the sun. 为了能使太阳能热水器工作，有一样东西是你需要的——太阳。

As you might expect, the heater will heat water only on sunny days. 正如你所愿，这种热水器只有在晴天才能工作。