symmetrical distribution

基本解释

PET scan was compared with MRI. Results In healthy subjects PET scan showed clear and symmetrical distribution of radioactivity in the cerebral lobes.
結果正常人腦PET顯像可見大腦各葉、基底節、丘腦、中腦及小腦放射性分佈均勻對稱。
In a symmetrical distribution, values are equally likely to fall above the mean as below it, and the most likely value, the mode, is equal to the mean.
從對稱分佈來看，分佈在中間值上麪的與下麪的差不多是相等的，最可能的值，即mode，是與中間值相等的。
In electric discharge milling machining (EDMM) process, the rotation of the tool electrode makes tool wear be axial symmetrical distribution, so it is possible to be compensated.
在電火花銑削加工中，由於工具電極作鏇轉運動，其損耗呈軸對稱分佈，使工具電極的補償成爲可能。