民宿消费在感性化，但民宿供给在理性化。
Where it can be applied
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More than 20,000 fans from all over the world flocked towards the Co-op Live arena in Manchester on Friday to watch Harry Styles perform his first concert in two and a half years – some waiting 48 hours for a place down the front.。PDF资料对此有专业解读
核心的瓶颈首先在于精度问题。目前技术虽然在不断进步，但在打印精细结构或大尺寸零件时，依然难以达到高精度装配所需的公差要求及优秀的表面质量要求，这直接导致了打印件难以直接作为最终功能部件使用。，详情可参考91视频