If a creature has damage reduction from more than one source,the
two forms of damage reduction do not stack.Instead,the creature gets the benefit of the best damage reduction in a given situation.For example,a werebear with damage reduction 10/silver receives a righteous might spell and gains damage reduction 5/evil.If the werebear is attacked with a weapon that is neither silver nor evil,it takes 10 fewer points of damage from each attack.Damage from a silver weapon that is not evil is not evil is reduced by 5 points per attack(since it bypasses the DR 10/silver but not the DR 5/evil),and damage from an evil weapon that is not silver is reduced by 10 points per attack(since it bypasses the DR 5/evil but not the DR 10/silver).Only a weapon that is both silver and evil(such as a silvered unholy weapon)deals full damage to the creature.

从这句跟下边的例子来看……我的想法应该没错?同种伤害减免能够叠加?