1)numerical concentration,数值浓度2)Median lethal concentration(LC50)value,半数致死浓度值3)concentration threshold,浓度阈值4)ratio concentration,比值浓度5)refractive index increment,折光指数(浓度)增值6)PH Potential of Hydrogen,PH值,氢离子浓度指数
用法例句
The experimental results show that four kinds of ocean tiny algae s chlorophyll contents continuously decrease with the ratio concentration of hydroxyl radical increasing.
