D2里面，此2属性为相对存在 准确率、防御值、双方等级对应的是命中率而不是伤害值
命中率的计算请点这里
原文：
http://www.hut.fi/~tgustafs/tohit.html by Tommi Gustafsson
attack rating的计算
翻译by 项链
Attack Rating = (Base Attack Rating + Direct Attack Rating Bonuses) x (1 + Attack Rating Bonuses / 100)
其中Base Attack Rating = (Dexterity x 5) - 35 + To Hit Factor
Direct Attack Rating = Base Attack Rating
+ Direct Attack Rating Modifier 1
................................
+ Direct Attack Rating Modifier N
（即物品上直接加成的ar就加到这里）
Attack Rating = Direct Attack Rating
+ [Direct Attack Rating x Percentage Attack Rating Modifier 1 / 100]
................................
+ [Direct Attack Rating x Percentage Attack Rating Modifier M / 100]
物品上直接加成的ar就加到这里是指Direct Attack Rating Modifier
下边那个同理
To Hit Factor因子
Class To Hit Factor
Amazon +5
Sorceress -15
Necromancer -10
Paladin +20
Barbarian +20
Druid +5
Assassin +15
