In the first meaning, when we are using " so-called" to indicate the common name for something, you are telling people what is the most typical term or word that is used for this idea or concept or thing.

在第一个含义中，当我们使用“so-called” 来表示某事物的通用名称时，您是在告诉人们什么是用于这个想法或概念或事物的最典型的术语或词。