And as you can see, in addition to the introduction, the cover advertises also a portrait of the author.

你们可以看到，除了引言，封面的宣传也是作者的画像。

耶鲁公开课 - 现代诗歌课程节选

Now, how different that is than the portrait of Charles that you saw by Titian.

你们可以对比一下,这幅画和提香的查尔斯有什么不同

耶鲁公开课 - 欧洲文明课程节选