(1)_______________________. The system we are going to describe is based on a design developed some years ago in Afghanistan. Since then, it has been built and used in many countries.
我们将要讲述的这种太阳能热水器系统是基于几年前阿富汗开发的一种设计。从那时起，许多国家建成并使用这种太阳能热水器。
It can heat seventy liters of water to sixty degrees Celsius. It can do this between sunrise and noon on a clear day with an average air temperature of thirty-two degrees Celsius.
它可以在晴天有日照，平均气温在摄氏32度的天气里，将70升水加热到摄氏60度。
There are two parts to the solar water heater. One part is made of a sheet of metal painted black. (2)_____________.
这种太阳能热水器分为2个部分。一部分是由涂成黑色的金属板制成。
This black metal plate is called a collector. The collector is placed in contact with the water.
这个黑色金属板被称为集热器。集热器与水直接接触。
WAIT A MOMENT,PLEASE作者: fangnan 时间: 2011-5-5 17:14
Solar water heaters are used around the world and not diffierent go build.作者: fjwbigben 时间: 2011-5-5 20:54
1.Solar water heaters are used around the world, and are not very difficult to build.
2.Black surfaces become heater in the sun than surfaces painted the other color.作者: davenc 时间: 2011-5-5 21:31
