广播电视英语短句 第 1 课：太阳能热水器-2

There are two parts to the solar water heater. One part is made of a sheet of metal painted black. 太阳能热水器由两部分组成。 一部分是一层被涂黑的金属层。

This metal surface, placed in contact with the water, will heat the water. 金属涂层的表面与水接触，并给水加热。

Black-painted surfaces that receive the sun's heat become hotter than surfaces of any other color. 黑色的涂层表面比其他任何颜色的表面具有更好的吸收太阳辐射热能的效果。

The black metal plate is called a collector. 这种黑色金属板被称为集热器。

There are several kinds of metal sheets that can be used for the collector. 有好几种能被用在集热器上的金属涂层。

Metal sheets that have raised sections will work very well. 凸起的金属涂层有很好的工作效能。