While the fifth energy is those saved by the proper measures to reduce energy loss and cost and advance the energy using ratio.

第五能源既采取一定的节能措施，降低能源的损失和浪费，提高能源的利用率而节省下来的能源。

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Studies show that people use approximately one fifth less energy when they are billed for exactly what they use.

研究表明，当人们按实际使用量付款时，他们使用的能源大约减少了五分之一。

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One of the sweetest features of the month will be having Mars (energy and light) moving through your fifth house of true love.

本月最幸福的事件之一，就是火星(活力与光明)会经过你的真爱五宫。

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EDF, which has three million domestic customers, is the fifth major energy firm to announce price rises and it is the biggest average increase so far.

BBC: EDF to raise gas and electricity prices by 10.8%

FoE Scotland chief executive Duncan McLaren said wave and tidal power could supply a fifth of UK energy needs and that Scotland was ideally placed to generate a significant amount of that energy.

BBC: NEWS | UK | Scotland | Positive waves over power project

Even so, says Neville Jackson of Ricardo, there remains much scope for improvement: petrol and diesel cars still typically use less than a fifth of the energy stored in their fuel to turn the wheels.

ECONOMIST: Carmakers: Revenge of the petrolheads | The