奇偶测站分别交替采用“后前前后”(BFFB)和“前后后前”(FBBF)的测量模 式(aBFFB)是常用的观测和记录格式。B 表示“Back”即后视,F 表示“Forward”即前视。
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经过测量反应前和反应后实验前后的可乐pH值发现前后酸性没有发生变化，排除了简单的碳酸反应导致这喷泉影响的想法。
Measurements of the pH of the Coke before and after the experiments showed that its acidity did not change, ruling out the idea that a simple acid-base reaction drives the fountains.
前后肢的角度协调，有足够的角度，可以提供充分的前躯伸展性和后躯驱动力。
Angulation front and rear must be balanced and adequate to give forward reach and rear drive.
文章分析了孔板的开孔率对管路最大流量、孔板前压力、孔板后压力和孔板前后压差等的影响。
The paper analyzed the influence of the orifice ratio on maximum discharge, the inlet pressure, outlet pressure, differential pressure, ect.
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