Today ribbed tube has been widely applied in economizer and improves on the boiler's safety and economics.

实践证明，它对提高锅炉安全、经济性有重要意义。

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Firstly, the fault-tolerant process control is introduced according to the safety and economics requirement of chemical, power, iron and steel processes.

首先，从工业生产过程的安全经济运行与控制需要出发，介绍了过程控制中容错的基本思想。

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We have to take safety, economics and environmental impact into consideration.

我们不得不把对安全，经济以及环境的影响考虑在内。

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However, industry skeptics say the economics and the safety of the concept remain untested.

CNN: U.S. backs project for small nuclear reactors

But given that nuclear power invariably involves great risks, not just in terms of safety but in terms of politics and economics too, there are good reasons to expect further complications in the months and years ahead.

BBC: Hitachi's nuclear deal still faces hurdles

In society, being responsible for your family means you will have to be considerate about safety, about the environment in which that family lives, and indeed about family economics - including motoring costs, Mr Samuelsson says.

BBC: Volvo eyes 'responsible' car buyers