A storm approaches. It's still over the horizon, but there's lightening in the air. Are either of them aware of the gathering turbulence? Can they feel the crackle of electricity in the wind? Or are they only aware of the power they generate between themselves? The first hint of the storm is not a thunderclap, but a knock.
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But actually, if you're really traveling on the cheap, usually for every five or six rooms there's a kitchen where you can knock up a snack, and that saves a lot of money.
其实，如果你真的在穷游，通常每5个或6个房间会配一个厨房，你就能简单凑活一顿，这样能省不少钱。
The energy of light varies across the spectrum (blue light is more energetic than red) but only a certain amount of energy is needed to knock an electron free.
光谱中光的能量是不同的(蓝光比红光更具能量)，但是只需一种确定的能量来碰触电子使其脱离。
But this New Year, resolve to be a healthy weight and knock off the pounds that this holiday season may have put on.
但是在这个新年里，决心要有一个健康的体重和减少在这个假期里可能增加了的体重。
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