（作者单位：中国社会科学院考古研究所）
In his Matching Soulmates paper in the journal of Public Economic Theory, everyone is in a computer simulated dating pool, where thousands of digitally created daters rank each other. His algorithm picks "first‑order soulmates": pairs who choose each other in a stable matching. It removes them, and runs it again with those left, and you get second‑order soulmates, and so on.，详情可参考im钱包官方下载
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刘成夫妻的遭遇并非个例。北京市海淀区人民法院网站2021年刊载的调研文章《代孕的司法困境及解决》显示，在选择代孕的调查样本中，因委托人或其配偶存在生理障碍，无法自行孕育子女的占到60%。。爱思助手下载最新版本对此有专业解读
Comparison between random dithering and ordered dithering. Left to right: random, ordered.