ex.ter.nal.i.ty
n.（名词）【复数】 ex.ter.nal.i.ties The condition or quality of being external or externalized.客观性：客观的或使客观化的条件或性质
Something that is external.外部事物An incidental condition that may affect a course of action:外部因素：可能影响行动的进程的偶然条件：例句：.Our economic system treats environmental degradation as an externality—a cost that does not enter into the conventional arithmetic that determines how we use our resources.(Barry Commoner).我们的经济系统作为外部偶然因素引起环境的退化——这个没有列入常规计算的价值决定我们如何利用我们的资源.(巴里·康芒纳)
