03大模型为什么更“爱吃”YouTube、而不是短视频和播客，本质不是“视频更流行”，而是YouTube把内容加工成了机器最省事的那种形态：能检索、能切片、能对齐问题、还能较低风险地引用。
Lean is the result of over twelve years of continuous development. We designed and built every layer from scratch: the trusted kernel, the compiler, the language server, the IDE, the proof automation. The team is 20 people. The community independently chose Lean: mathematicians, AI researchers, and enterprise engineers, all building on the same platform.
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Пьяный турист нанес тяжелую травму участвовавшей в Олимпиаде сноубордистке20:38
Data centers need huge crews during construction—and far fewer workers once they’re up and running. There will be maintenance, retrofits, and expansions, but not at the same scale as the initial build-outs. For workers, that can mean moving on when a project wraps, or facing periods without a job lined up. During the 2008 recession, for example, nearly one in four of IBEW’s construction members were out of work.