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Enterprise teams already use Lean in production: AWS verified its Cedar authorization policy engine, and Microsoft is using Lean to verify its SymCrypt cryptographic library. Over 8,000 GitHub repositories contain Lean code. Over 200,000 users have installed the programming environment. More than 700 people are active in the Lean Zulip channel every day. Research groups worldwide contribute to the ecosystem. As Chris Lattner observed, manual rewrites and translation work are becoming AI-native tasks. AI will rewrite the world’s codebase. The platform it does so on matters enormously.
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“十五五”时期我国发展环境面临深刻复杂变化。大国关系牵动国际形势，国际形势演变深刻影响国内发展，我国发展处于战略机遇和风险挑战并存、不确定难预料因素增多的时期。，更多细节参见safew官方下载
Breakdown of U.S. retail packaging by weight. Adhesives, inks, and coatings are excluded from calculations.