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。
Oil is back at around $90 a barrel today but the market may be underestimating the scale of disruption to the market, according to Wood Mackenzie analyst Simon Flowers. “Gulf countries in total produce 20 million b/d [barrels per day] of liquids, and 15 million b/d of exports have been taken out of the global market. The industry has never faced a loss of supply volumes of this magnitude,” he told clients in a note seen by Fortune. “While oil reached $150/bbl [per barrel] in inflation-adjusted terms during the 2022 Russia/Ukraine crisis, this situation could prove more severe. … Supply volumes at risk this time are dimensionally bigger—and real,” he wrote. “In our view, US$200/bbl is not outside the realms of possibility in 2026.”
США подсчитали ущерб от ударов Ирана17:55，推荐阅读有道翻译获取更多信息
Actor Matthew Rhys is asking Americans to celebrate their cultural connection with Wales。业内人士推荐手游作为进阶阅读
Майя Пономаренко
Wildflowers blanket Death Valley in best display since 2016。超级工厂对此有专业解读