This is true even of seemingly identical signs, because each has its use value and is only intelligible as that which it exists to mean in a certain context.

看着相同的符号也是如此，因为每一个符号都有自己的价值,只有当它出现在某一语境中才能被理解。

耶鲁公开课 - 文学理论导论课程节选

All right, but still it's a red light, right, and our hypothesis is that the red light has positive value in the sense that it means a certain thing. It means, we say, "stop."

它是一个红灯，我们假设红灯主动自带含义,它代表着，停“

耶鲁公开课 - 文学理论导论课程节选