You can check out books from home, you can research on the way to school or from school, but these are really two big assumptions, that one, you have access at home, and two, that you have access to a mobile phone, and in Philadelphia, many kids do not.
你可以在家借书， 你可以在上学或放学路上查资料， 但是，这里面有两大假设， 第一，你在家能上网， 第二，你拥有一个手机， 而在费城，多数孩子两者都没有。