divisions分区divisionn.划分；除法；部门；分开；师（军队）division of profit利润划分division of factor要素分工Division Rear Area师后方地区division of design设计分工division of income收入分配divisions dorsales背侧股division standards分类标准division operation除运算divisional service分区化服务division algorithm带余除法,辗转相除法