法国世界报周四表示，德国总理默茨此次访问杭州，绝非偶然，因为，杭州已经成为了中国数字革命的心脏城市。
At its core, a stream is just a sequence of data that arrives over time. You don't have all of it at once. You process it incrementally as it becomes available.
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The bigger they come, the slower they move
Authors:Ryan Gibb, Patrick Ferris, David Allsopp, Thomas Gazagnaire, Anil Madhavapeddy