that's not our goal," "What our goal has to be is to advance the clean energy solutions in this country that can strengthen our economy, put people back to work, diversify our energy sources."

VOA: standard.2009.06.02

So what that means is that's how much energy we would have to put into a hydrogen molecule in order to get it to split apart into its two atoms.

它的意义,就是我们需要向一个氢分子中注入这么大的能量,才能将它分解成两个独立的原子。

麻省理工公开课 - 化学原理课程节选

If we have a higher z effective, it's pulled in tighter, we have to put in more energy in order to eject an electron, so it turns out that that's why case 2 is actually the lowest energy that we need to put in.

而如果有效核电量更高，原子核的束缚也就更紧，我们不得不输入更多的能量来打出一个电子，这就是第二种情况,所需要输入的,能量更少的原因。

麻省理工公开课 - 化学原理课程节选

But they have an alternative: Call a cease fire and upgrade what they have: Put in energy-efficient appliances, update that pink-tiled bathroom, and give the place a fresh paintjob.

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Cook says that last year they put enormous energy in expanding ecosystem geographically.

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Yet in both devices the heat output is limited to the amount of energy put in.

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