It's a piece of language but it also belongs to other sorts of semiotic systems as we'll immediately see.

它是一种语言,它属于一个特殊的语义系统,下面我来解释一下。

耶鲁公开课 - 文学理论导论课程节选

these things are explained in terms of cognitive systems that we're not aware of.

我们无法觉察到的认知系统,予以解释。

耶鲁公开课 - 心理学导论课程节选