The system has been put in use and the efficiency of work has been improved greatly.

该系统现已投入使用，大大提高了工作效率。

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Remaining health enables one to regenerate energy, refresh mind and thus improve the efficiency of work and study.

保持健康使人恢复体能，清醒头脑，因此，提高工作和学习的效率。

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The new research model got over the lack of communication during studying, enhanced the cooperation among researchers, and improved the efficiency of work and speed.

新的集成研究模式克服了传统研究过程中各学科之间的交流不足，促进了各学科之间的合作，提高了研究效率和成果的转化速度。

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And in practical terms, we can define the efficiency as the ratio of the heat in to the work out.

在实际中，我们定义,效率为热与功的比值。

麻省理工公开课 - 热力学与动力学课程节选

In the meantime, I believe that the U.S. is doing quite a bit of work in terms of raising fuel efficiency standards,

同时，我相信美国在提高燃料效率标准方面做了不少事，

对全球变暖的政策 - SpeakingMax英语口语达人

Since utilities are in the business of generating and distributing energy and not saving it, most of the energy efficiency work in California has been outsourced to companies that specialize in that type of work.

FORBES: Sustainability Lessons for the Big Apple

While bacteria do most of the work, incorporating plants improves the efficiency of the system.

FORBES: Magazine Article

Our new models come from industries that have learned to increase the capabilities and efficiency of the human beings who work for them.

NEWYORKER: Big Med