鲁宾逊咖啡屋里的人正在变少，但也只是渐少而已。The crowd in Robinson's Coffee-House was thinning, but only by degrees.首先, 激励人们避免去伤害他人的因素变少了.First, people would have less incentive to avoid injuring other people.而且, 渔民发现海洋中的鱼类变少了.Also, fish...

“变少”的英语可以翻译为：[医]lessen，tail off ...