The relationship between the population growth rate and the food concentration was curvilinear correlation.
其中，轮虫种群增长率与食物浓度间呈曲线相关；
Moreover, the fitting degree of curvilinear regression equation is tested by correlation index, in stead of correlation coefficient which has been unsuitably used for testing in similar works.
此外，用相关指数来检验曲线回归方程的拟合程度，而不采用在类似的研究中用相关系数来检验曲线回归这一不合适的方法。
Moreover, the fitting degree of curvilinear regression equation is tested by correlation index, in stead of correlation coefficient which has been unsuitably used for testing in similar works.
此外，用相关指数来检验曲线回归方程的拟合程度，而不采用在类似的研究中用相关系数来检验曲线回归这一不合适的方法。
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