time.sleep(2 ** attempt) # 指数退避
美国用“成本内部化”强行给算力降温，中国用“系统规划”持续放大规模优势。两条路径，一场决战：未来十年，算力之争的终局，是能源之战。
。关于这个话题，谷歌浏览器【最新下载地址】提供了深入分析
When using the probability matrix to pick from the candidate set, it is important that the candidate array be sorted in advance. Not doing so will fail to preserve the patterns distinctive of ordered dithering. A good approach is to sort the candidate colours by luminance, or the measure of a colour’s lightness4. When this is done, we effectively minimise the contrast between successive candidates in the array, making it easier to observe the pattern embedded the matrix.
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