她26岁，渴望能有所作为- - -能找到或改进一种获得有用能源的方式，这种能源最好是不稀缺、不易失、可预测、无污染的。
She was 26 years old and eager to make a difference-to find or improve upon a useful source of energy, preferably one that wasn't scarce or fleeting or unpredictable or dirty. The sun was going down.
飞轮储能单元代替传统的化学电池，具有免维护、寿命长、无污染的特点。
The flywheel energy storage unit, which replaces the conventional chemical battery, is maintenance free, has long life and emits no pollution.
现在，许多国家正努力开发无污染和可回收利用的新能源是，例如，太阳能，核能和风能。
Nowdays, many countries are trying develop new types of energy which are clean and recyclable, for example, solar energy, nuclear energy and wind power.
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