Well first is, you go over here to the right hand side for each one, and it says click here for the full text article.

首先在每份资料的右侧,写着点击获取全文

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Then you go over here to where it says PDF and you click on that and that will allow you to download the whole article, which will look something like this.

之后找到并点击写着PDF的按键,这样就能下载全文了,就像这样

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选