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。业内人士推荐夫子作为进阶阅读
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在流量红利尚在的阶段，交易规模的扩张可以掩盖效率与分配问题；但当新增用户放缓、使用频率趋稳，平台增长就不可避免地从规模扩张转向单位变现。这一转变，使抽佣的性质发生了变化。它不再只是对撮合价值的回报，而逐渐承担起补增长的角色。
Perhaps it’s the biggest question science has left to answer, how did life begin? Now, molecular biologists in Cambridge university have discovered tiny molecules of RNA which they say might provide some clues. Science journalist and author Philip Ball explains what we know and whether we’ll ever find the origins of life on earth.