And just assume that we will be collecting data during five seconds, and that would correspond to one terabyte of data -- that's 800,000 books and 16 kilometers of phone books.
试想一下， 我们在5秒钟内收集的数据， 大小为一百万兆。 那相当于八十万本书 或一万六千米厚的电话簿。