短語詞組短語membership relative grade 相對隸屬度the maximum membership grade 最大隸屬度Membership grade check 檢查會員等級direction membership grade error 方向隸屬度誤差comprehensive membership grade 綜合隸屬度multivariate membership grade function 多元隸屬函數principle of membership grade 隸屬度原則Discount membership grade 會員等級折扣 返回 membership grade