With some exceptions, the oldest homes tend to be the least energy-efficient.

除了一些例外，最老旧的房屋往往是最不节能的。

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An electron in the innermost orbit has the least energy.

最里面的轨道上的电子能量最低。

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Incandescent light is the least energy efficient lighting.

白炽灯是效能最不好的。

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State utility Florida Power and Light says its Arcadia plant will produce 25 megawatts of energy, making it the largest in the nation at least for now.

VOA: standard.2009.10.27

And in this case we're going to look at silicone, and we'll say if you can point out to me which requires the least amount of energy.

这次我们要做的是关于硅的，我们来看看大家是不是,能够为我指出那一项需要消耗的能量最少。

麻省理工公开课 - 化学原理课程节选

The electron's going to come out of that highest occupied atomic orbital, that one that's the highest in energy, because that's going to be the at least amount of energy it needs to eject something.

这个电子应该是从,最高的被占据轨道上出来的，它的能级是最高的，因为这样的话发射出它,只需要消耗最少的能量。

麻省理工公开课 - 化学原理课程节选

It will not happen without serious effort and luck, at least until energy income declines.

FORBES: Why Have The Islamic Countries Failed To Develop Even With Resources Like Oil, While Countries With No Resources Like Switzerland Have Flourished?

Caribbean banks, not least in energy-rich Trinidad, are awash with cash and have been eager to lend provided there's a government guarantee.

ECONOMIST: Debt in the Caribbean

On the plus side, at least the energy tax credit still exists.

FORBES: Heat Wave Sweeps U.S., Reminds Taxpayers of Value of Energy Credits