These are obvious, but just to put them in comparison with what you'll see in the middle.
这些挺明显的,但是好让你们能和,之后看到的一些图片做个比较
The readings will be a mix between things that'll be quite easy for you to understand, things from the popular media, etc., and then some more sophisticated publications from scientific journals.
材料涵盖面很广,这样更有助于你们理解,比如一些大众读物,和一些比较艰深的学术期刊上的文章
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