The parallel-connection and variable-speed operation characters of the centrifugal pump groups are studied by conics fitting of the character curves in the high efficiency area.

通过对离心式水泵高效工作区的性能曲线进行二次拟合，分析了离心式水泵机组并联调速运行特性。

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Not to be left out of the burgeoning energy efficiency area, Microsoft earlier this week released the beta of Hohm, an application that gives homeowners advice on how to cut their energy bills.

为了不被排除在新兴能源效率领域，微软本周早些时候发布了霍姆测试，应用程序，让业主就如何削减他们的能源法案的意见。

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This efficiency of the birch bark canoe also made an impression on newcomers to the area.

这种桦树皮独木舟的效率也给新来的人留下了深刻的印象。

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"We really have explored every area of efficiency, " said Mr Carter.

BBC: Kent 'needs ?15m cuts on top of ?60m'

Solar charge times are determined by the total area and efficiency of the solar cells -- the Spark uses high-efficiency monocristalline cells which will charge an iPad from about 10 hours of sunshine.

ENGADGET: Voltaic Spark Tablet Case powers your pad with the Sun's rays

The Olympics are not the only area in which efficiency is a concern.

ECONOMIST: A new democracy | The