Consumer expectations are shifting—businesses must adapt or risk irrelevance.
有了图书馆,你就是自由的,不会被暂时的政治气候所限制。它是最民主的机构,因为没有人——绝对没有人——能告诉你该读什么、什么时候读以及如何读。
The P versus NP problem is one of the most important unsolved problems in computer science.