求翻译：这也很容易理解，一个是学术研究著作，而美国漫画则是在各种商业动机和政治动机推动下出现的，他们的作用是娱乐大众的同时起到宣传作用。是什么意思？

It is also very easy to understand, a book of academic research, while the U.S. is in a variety of cartoon and commercial motivation appears driven by political motives, their role is to entertain the public at the same time play an advocacy role.

This is also very easy to understand that an academic research and publications, and the United States comics are in a variety of commercial and political motives, and they promote the role of the mass entertainment advocacy role.

This very is also easy to understand that, one is the scholarly research work, but the American cartoon is appears in each kind of commercial motive and under the political motive impetus, their role is entertainment populace's at the same time plays the propaganda function.

This is also very easy to understand, one academic research works, and United States comic was inspired by the various commercial and political motives appear, their role is to entertain and play an advocacy role.

This is also very easy to understand, one academic research works, and United States comic was inspired by the various commercial and political motives appear, their role is to entertain and play an advocacy role.