Per.mi.an
adj.(形容词)Of, belonging to, or designating the geologic time, system of rocks, and sedimentary deposits of the seventh and last period of the Paleozoic Era.See table at geologic time 二叠纪的,二叠岩的:是、属于或标明为古生代第七个和最后一个阶段的地质时期、岩层及沉积矿藏参见 geologic timen.(名词)The Permian Period.二叠纪
来源:After Perm , a historical region of eastern European U.S.S.R. 源自 波尔姆 ,苏联东欧部分的一个历史地区