When homeowners replace a working oil system, it can take five or ten years, if not longer, to get their money back in fuel savings.

当住户们替换掉一个燃油设备后，他们如果不用等更久的话，那么在五年或者七年时间里就能拿回因节约燃料而得到的补偿的钱。

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Working oil system is the key part in variable speed turbo coupling, while the problem of working oil temperature does harm to running of variable speed turbo coupling sometimes.

工作油系统是液力耦合器的关键环节，而工作油温问题时常影响液力耦合器的正常使用。

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Moving out of the laboratory and onto the water, with a working oil-collection system, is the next step.

计划的下一步是将实验用之于实践，并形成一个收集石油的体系。

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Moving out of the laboratory and onto the water, with a working oil-collection system, is the next step.

ECONOMIST: Monitor