垂钓者常有这样的体会:在一处不曾垂钓过的湖泊初钓时,鱼儿往往群聚而来,频频上钩;随着垂钓者的人次不断增多和频繁,上钩率渐渐下降,钓获也日趋减少,上钩的大鱼更是寥寥无几。于是,垂钓者大都认为,这是因为鱼儿越钓越少了,以致无鱼上钩。其实不然,这种看法是“只知其然,而不知 Anglers often have such an experience: in a fishing lake has not been fishing, the fish often come together, frequently bifurcated; with the increasing number of anglers and frequent, the hook rate gradually decreased, catch also Declining, big fish hooked is very few. As a result, most anglers think that this is because the more fish they fish, the less fish they hook. In actual fact, this view is "only know it, and I do not know