Blockchain technology was originally invented in 1991 by two mathematicians, Stuart Haber and W. Scot Stornetta. They first proposed the system to ensure that timestamps could not be tampered with.
围炉之“炉”，从前是炭火炉，如今是电磁炉。不变的是在氤氲的热气里，一家人坐着塑料凳，在木桌前簇拥着，必须起身才够得到对角线的菜。夹肉的筷子频频打架，火锅沸腾到锅盖跳舞了才手忙脚乱地关掉，身后的电视机明明开了很大声音，却总是什么也听不清。
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The Nasa pair embraced their longer-than-expected stay in space.
By appropriately scaling the perturbation amount for each colour channel separately, we can also extend this to work with palettes where is different for each colour component, provided that they are still regularly spaced. Unfortunately, the less regular the palette is, the less effective this technique becomes. If we wish to leverage the strengths of ordered dithering for use with irregular or arbitrary palettes, a more general solution is needed.，这一点在快连下载安装中也有详细论述