Running on solar power gathered from its rooftop supplemented with grid energy, the "Fast Bus" is expected to top out just shy of 40 miles per hour, so it's not ideal for long treks.
通过电能和顶部太阳能装置收集的太阳能共同驱动，这种巴士最快能达到40公里每小时的速度，因此它不适合用作长线行驶。
No one is sure just how many Americans live off the national public-utilities grid - relying on generators or alternate energy sources such as solar, wind and geothermal.
没人知道究竟有多少美国人靠国家公共事业的网络生活—依靠发电机或替代能源，如太阳能、风能和地热能。
Off-grid energy systems such as photovoltaics, solar water heating, and on-site water collection can keep basic services going.
非常规的能源系统例如光电科技，太阳能热水及就地取水都能运作建筑的基本设施。
Solar and wind are intermittent energy sources, but if utilities have better controls along the grid that allow them to store energy or switch sources quickly, they can rely on them more confidently.
太阳能和风能的间歇性能源，但如果公用事业沿格，让他们能够储存能量的来源或开关迅速更好的控制，他们可以依靠他们更多的自信。
Solar and wind are intermittent energy sources, but if utilities have better controls along the grid that allow them to store energy or switch sources quickly, they can rely on them more confidently.
太阳能和风能的间歇性能源，但如果公用事业沿格，让他们能够储存能量的来源或开关迅速更好的控制，他们可以依靠他们更多的自信。
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