Remark and evaluation about the essentials of the indirectcorrelation and the way recommendable to the direct correlation were made in this paper.
文中评述了间接对比方法的各个步骤的要点及直接对比方法的可能途径。
2
There was a significantly negative correlation between V-C and titrationable acid, titrationable acid could be used as an indirect trait for selecting V-C.