Pà / lèi / tuō / fǎ / zé / zhǐ / chū / bā / shí / bǎi / fēn / zhī / de / jié / guǒ / lái / zì / èr / shí / bǎi / fēn / zhī / de / yuán / yīn

帕累托法则指出80%的结果来自20%的原因

The Pareto principle states that 80% of results come from 20% of causes