三区分划法
the three zoning treatment
划分区分矩阵
partition discernibility matrx
三分三
anisodus acutangulus
acutangular anisodus root
三区分布
Distribution of Three Zones
按地区划分的选举
geographically based election
按地区划分的选区
district-based constituency
保护区划分
protection areas delineation
delineating of protection areas
protection zone compartmentalization
保护区划分方法
protection zone delineation method
冰区划分
icing zone plotting
categorization of icing regions
icing area plotting
icing area devision