The new material has such highenergydensity because it can operate at a higher voltage than current electrode materials and also store more lithium ions.
There is no realistic prospect for widespread electric air travel: the jet engines on aircraft need the high-energydensity that only chemical fuels can provide.
广泛的以电力为驱动的空中旅行很不现实:飞机发动机需要高密度的能量,而这些只有化学燃料才可提供。
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Highenergydensity means that there are a lot of calories in a little food.