A stereotype is nothing to do with stereo music, but it's the noun we use to describe a very simple and basic judgement of someone and their character and personality based on their age, nationality, profession and so on.

Stereotype这个词跟立体声音乐一点关系都没有，它是一个名词，指的是我们基于某人的年龄、国籍、职业等对他们以及他们的性格和个性进行的非常简单和基本的判断。