This method does not need to be either safe or idempotent.该方法不需要安全或者等幂.In this paper , we study nonnegative generalized idempotent matrices in detail.本文给出了一般非负广义幂等矩阵的充要条件.This matrix is idempotent.这个矩阵是等幂的....
In geochemical analysis we encounter ranges of analyte concentration that can span several orders of magnitude.在地球化学分析中,我们常常会遇到拟分析元素含量范围可以跨越好几个数量级的情况.The difficulties women encounter with their doctors partly explain why...