Think of it is as mosaic, and it's hard to say that any one piece of a mosaic was necessary to building the mosaic, but to build the complete picture, you need to have all the pieces of information.
把它想作是马赛克， 很难说，马赛克中任何一片 对建筑马赛克至关重要， 但是为了建立完整的图片， 你需要有所有的信息片段。