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。
The First Counter-Attack
。91视频是该领域的重要参考
British YouTuber James Bruton wanted to build a giant walking robot from Star Wars – and ride around on it on his friend's tennis court. "My goal is to have something people would click on," he says.
So what exactly do these shiny new earbuds have to offer? According to Mashable's Bethany Allard in her piece on everything to know about them, published following the latest Galaxy Unpacked event, "The Buds4 Pro come with an audio improvement in the form of a wider woofer. Up from a 10.5mm DD woofer on the Buds3 Pro, the newer gen will feature an 11mm SuperWide woofer. It is worth noting, however, that the Buds3 Pro featured a 6.1mm planar tweeter, while the Buds4 Pro feature a 5.5mm planar tweeter."