So it's unreasonable to think that a country can base its scholastic system only on the few things that students like.

unreasonable 是由前缀 un-（表示"不、非"）和形容词 reasonable（合理的）组成的复合词。reasonable 来自动词 reason（推理、思考），加上后缀 -able（能够...的），字面意思是"能够通过理性思考的"。 unreasonable 整体意思是"不合理的、不合逻辑的"，指缺乏理性基础或不符合常理的判断或行为。