The worse the water condition was, the lower the efficiency of transpiration was.

同一树种蒸腾效率随立地水分条件而变化，水分条件愈差，蒸腾效率亦愈低。

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From the performance perspective, the lower the efficiency of the impeller, the impeller is only equivalent to an ordinary closed around 70%, a relatively flat head curve.

从性能上讲，该叶轮效率较低，仅相当于普通闭式叶轮的70%左右，扬程曲线比较平坦。

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The pressure oscillation in piping system can lower the efficiency of the pump, cause the additional consume of energy and emit noise, deteriorate the working condition of the accessory.

管道系统中的压力脉动会对管道系统中造成许多危害，例如它会降低泵的工作效率、增加额外的能耗、产生噪声，使管道附件的工况变坏和造成管道振动等等。

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And those with lower sleep efficiency, the amount of time they spent in bed asleep, were at higher risk too.

CNN: Study: Can more sleep help fight off colds?

The obvious way, apart from improving the efficiency of the tax office, to lower France's high rates of income tax would be to broaden the tax net.

ECONOMIST: Christian Sautter, France��s wary finance minister

My firm's research suggests that business and consumer confidence there is high, that there is not too much leverage in China's marketplace (leverage, not high prices, is what causes dangerous real estate and stock bubbles) and that the government is investing smartly in infrastructure projects like rail lines, subways and clean technology initiatives that improve economic efficiency and lower the costs of doing business.

FORBES: Leadership