adj.固若金汤的；无法伤害的
The banks are not invulnerable. 银行并非固若金汤。
The submarine is invulnerable to attack while at sea. 潜艇固若金汤，海上攻击打不倒。
They are invulnerable, because no animal can actually kill them. 因为没有动物能实际上杀他们，所以他们是不会受伤害的。
The dangerous drivers are those who think they're invulnerable. 那些危险驾驶的人就是以为自己不会受伤。
