There existed two common factors called macroelement factor and trace element factor, which indicate the contents of macroelements and trace elements in the plants respectively.
因子分析中认为存在大量元素与微量元素两个公共因子，分别代表着植物中大量元素与微量元素的含量状况。
For each "new" element, factor the learning curves into the estimates.
针对每一项“新”元素，把学习曲线作为一个因素加入到评估之中。
For each "new" element, factor the learning curves into the estimates.
针对每一项“新”元素，把学习曲线作为一个因素加入到评估之中。
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