In other words, all of them are modes of communication with which we function, the intelligibility of which allows us to negotiate the world around us.

也就是说，它们都是我们应用的交流模式，帮助我们理解周围的世界。

耶鲁公开课 - 文学理论导论课程节选

Okay. So the intelligibility of sign systems is their conventionality.

所以符号的意义来源于它的惯例。

耶鲁公开课 - 文学理论导论课程节选