第三种太阳能灶是抛物面式炉具。这种炉具有着圆形的墙壁，直接将太阳光聚焦到炉具的底部。
摘要：Sacramento，Kenya
The food is inside a separate container of plastic or glass that traps heat energy. People can build panel cookers quickly and with very few supplies. They do not cost much. In Kenya, for example, panel cookers are being manufactured for just $2. The third kind of solar oven is a parabolic cooker. …
把食物放入一个单独的、收集热量的塑料或玻璃容器内。人们可以用很少的材料快速做成板式炉具，而且花费也不多。比如在肯尼亚，制造板式炉具只需2美元。 第三种太阳能灶是抛物面式炉具。这种炉具有着圆形的墙壁，直接将太阳光聚焦到炉具的底部。在抛物面式炉具上煮食速度很快，然而，这些炊具很难制造。它们必须经常校准以…