All the phenomena show: water flow resistance is the important prerequisite to cause transpiration fluctuation, and the latter can be the result of stomatal oscillation.

这些现象说明，水流阻力是蒸腾波动产生的重要前提条件，而蒸腾波动则可能是气孔开合波动的直接结果。

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Active water or light oil is sent downhole through hollow rod to reduce oil flow resistance, thus producing heavy oil from deep formation through screw pump.

利用空心杆向井筒内掺入活性水或稀油，降低油流阻力，实现应用螺杆泵开采深层稠油。

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The keels, finlets, and corselet help direct the flow of water over the body surface in such as way as to reduce resistance (see the figure).

龙骨，小鳍和盔甲帮助引导水流流过身体表面，他们用这种方式来降低水的阻力（看图示）。

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