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。
French director Ugo Bienvenu's Academy Award–nominated animated film Arco is part fanciful tale of rainbows, time travel, and childhood friendship, part climate change fable. It all kicks off when 10-year-old Arco (voiced by Juliano Valdi in the English-language dub) steals his sister's time-traveling cloak and journeys from 2932 to 2075. There, he becomes fast friends with young Iris (voiced by Romy Fay), and the two endeavor to get him home. The pair's efforts play out against a sobering backdrop of ecological disaster, creating a poignant portrait of a world in crisis, and the hopeful young souls who will inherit it.
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The call did eventually come after 10 long months. But there are more than 8,000 people - more than ever before - currently waiting for an organ donation in the UK.