广播电视英语短句 第 208 课：室内空气污染-3

Most of the stoves look like large, deep cooking pots. 大部分的炉子都像又大又深的饭锅。

They have an opening at the bottom for the fire and a place on top to put a pot. 这些炉子都下端开口烧火，上端的位置放锅。

In the late nineteen seventies, Aprovecho produced a popular stove called the Lorena. 十九世纪七十年代末， Aprovecho 研究中心研制了一个非常受欢迎叫到 Lorena 的炉子。

The Lorena was very good at reducing smoke and warming homes. Lorena 炉子可以很好的减少烟雾的产生，使屋子迅速暖和。

But new tests years later found that it was not very efficient. 但是多年后新的测试发现这种炉子并不是那么的有效。