如果投机完全是碰运气，赚钱和赔钱的概率差不多相等，对社会没有什么作用(如果不计入投机所消耗的人力物力)。
If speculation depends completely on luck, the probability of making and losing money is almost equal, which has no effect on society. (if the human resources and materials consumed are not included.)
youdao