Meanwhile, the Drazin inverses of PQ and P - Q are established.同时, 给出正交投影的积PQ和差P -Q 的Drazin逆的表达式.In this paper, we investigate the Drazin inverse of a morphism in additive category.本文研究了加法范畴上态射的Drazin逆....
患心脏病 、 高血压、恐高症者,身体感觉不适者.Having heart disease, hypertension or acrophobia or feeling bad.她有恐高症,到了高楼的电梯里就发晕.She has acrophobia and always becomes dizzy in a high - rise elevator.很可惜, 我享受不了. 我有恐高症.Unfortunately, I can'...
目前关于压力调整的理论表明摄入咖啡因能增加压力并且有时会使焦虑加倍.Existing theories about stress management suggest that caffeine consumption can promote stress and sometimes worsen anxiety....
Larry began suffering severe headaches and violent mood swings.拉里开始出现严重的头痛和剧烈的情绪波动。Larry has been in an institution since he was four.拉里从4岁起就一直生活在孤儿院。Larry Layton's trial is going full tilt right now.拉里·莱顿一案的审判工作即将全...