The idea is that a well-kept car will consume less fuel, pump out fewer greenhouse gases and also last longer, which in the longterm helps the environment and your bank balance.

原因是一辆保养得好的汽车消耗较少的燃料，释放较少的温室气体，使用寿命更长，这样可以在很长一段时间内保持环境和你银行帐户的平衡。

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So you put in more fuel, more uranium 235, a higher enrichment and you need to balance that excess reactivity in a number of ways.

所以你放入更多的燃料，更多的铀，一个能咖的浓缩度，你需要平衡，剩余反应性，用很多方法。

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Add fuel stream to the heat and material balance.

增设燃料流以达到热平衡和物料平衡。

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Dorothy Thompson, chief executive of Drax, told BBC News that biomass was the ideal fuel to balance variable wind power.

BBC: Biomass may hinder climate fight

The degree to which this technique can fulfil its promise to lower CO2 and provide a sustainable fuel source depends crucially on the balance of energy it requires and the energy it stores.

BBC: Petrol from air: Will it make a difference?

He said the party would also aim to create sustainable employment, cut fuel taxes and "strike the right balance" between punishing and rehabilitating criminals.

BBC: Swinney unveils party vision