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。
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。
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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