求翻译：以抑制率fa为横坐标，cI为纵坐标作量效曲线，进而判断两药在不同效应时各自所需药物浓度之间相互作用是否为协同、相加还是拮抗。是什么意思？

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In order to curtail rate cI fa for the horizontal axis, vertical axis, and thus as the volume of curve judgment when two drugs in different effects interaction between their respective requirements whether drug concentrations for synergy, additivity or antagonist.

Take suppresses rate fa as the x-coordinate, cI is the y-coordinate makes the quantity effect curve, then judges two medicines when the different effect each one needs between the medicine density to affect mutually whether for the coordination, adding together oppresses anti-.

Inhibition rate of FA for the horizontal coordinate, cI for the ordinates as the dose-effect curves, each in so far as is needed to judge the effects of drugs in two different interactions between drug concentration is a synergy, adding it is antagonistic.