efficiency ratio短语¹⁴⁴⁹⁷²⁺² 基本例句 效率比,功效比值 The protein efficiency ratio tended to decrease with increasing dietary protein level, but there is no significant difference among the diets containing35%, 40% and50% protein levels P>0.05. 蛋白质效率总体上随着蛋白质水平的增加趋于降低，但在35%、40%和50%试验组之间无显著差异 P>0.05。 cnki