Solar heating is technically and economically feasible.

太阳能供热在技术上和经济上都可行。

Our star's path across the sky is low, the days are shorter, and solar heating is minimal.

我们的恒星穿过天空的路径很低，白天更短，太阳能加热也很少。

Chapter 2: Solar Heating: The Starter's Gun The race to create wind begins with the Sun, our solar system's star athlete.

第二章：太阳能加热：发令枪 创造风的竞赛始于太阳，我们太阳系的明星运动员。

Solar heating can be used in most areas of the United States, but it is most practical in areas where there is a lot of winter sunshine, where heat is necessary, and where fuel is expensive.

美国大部分地区都可以使用太阳能供暖，但在冬季阳光充足、 需要供暖和燃料昂贵的地区最实用。