Energy independence is not just a goal; it's a necessity for national security.
The human mind is so complex and things are so tangled up with each other that, to explain a blade of grass, one would have to make a diagram of the universe.
网络更像是一种社会创造,而不是技术创造。我设计它是为了社会效应——帮助人们一起工作——而不是作为一种技术玩具。