Their relationship is necessary but, as we'll see in a minute, arbitrary, and each sign is like that.

这种关系十分必要，但是它又有任意性。

耶鲁公开课 - 文学理论导论课程节选

But it's absolutely essential--so the shares only mean something as a relation to their total number of shares.

这是十分必要的,所有股票只有在,和总体股本数量联系起来看时才有意义

耶鲁公开课 - 金融市场课程节选