This allows for very efficient range searching when key values are not sparse.

这样一来，当键值不是很稀疏的时候，就可以获得非常高效的范围搜索。

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The centrifugal pump with wide efficient range is developed based on the maximum flow design method.

基于加大流量设计法，采用增加分流叶片和增大喉部面积等措施，研制了高效区宽离心泵。

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It is small and efficient, it runs on a wide range of hardware, it is network-transparent, and it is well documented.

它很小但很有效，它运行在为数众多的硬件上，它对网络透明并且有良好的文档说明。

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Offering a wider range of fuel efficient cars has been one of the focus areas of the company.

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Others are offering continuously variable transmissions (CVT), which have no traditional gears but keep the engine at its most fuel-efficient RPM across a wide range of speeds.

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The Karma Sedan is a series Plug-in Hybrid Electric Vehicle (PHEV) powered by a lithium-ion battery and an efficient 2.0-liter range-extending gasoline engine.

ENGADGET: Fisker Karma gets EPA-certified 52MPGe, sales ready to begin