it stands to reason idiom
C2 不言而喻，显而易见
said when something is obvious or clear from the facts
If 20 percent of the earth's population has 80 percent of its resources, then it stands to reason that 80 percent of the population has only 20 percent of the resources. 如果地球上20%的人口占有了80%的资源，那么不言而喻，80%的人口只拥有20%的资源。