There have been fundamental changes through time that make the role of the central bank evolve and change through time.

试图保持系统的稳定,随着时间的发展，基本的改变发生,使得中央银行的角色演变。

耶鲁公开课 - 金融市场课程节选

That's some sense of the spectrum of magazines that are coming out, and all with different roles to play in this culture and that position their writers and poets and artists associated with them in different ways.

对于设定即将出版的杂志的基调，以及它们在文学发展中扮演的不同角色,作家诗人和艺术家们以不同方式与之相连的地位,都具有一定的意义。

耶鲁公开课 - 现代诗歌课程节选