The results show that, in the slope with anchors reinforcement, there exists an effective length;

表明：①锚杆加固边坡时，存在一有效锚固长度；

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In the case of constant pipe diameter, lengthening the length of vacuum tube is an effective way to increase the total heat of solar water heater!

在管径恒定的情况下，加长真空管的长度是增加太阳能热水器总得热量的有效途径和方向！

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Effective pile length is an important problem that should be thought about when making a design of flexible piles composite foundation.

有效桩长是柔性桩复合地基设计时需要考虑的一个重大问题。

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Even if experimenters bounce the beams to and fro to increase the effective length of an interferometer's arms to more than 100 kilometres, the expected difference in length between the two beams' paths still amounts to less than a hundred-millionth of the diameter of a hydrogen atom.

ECONOMIST: Fundamental physics