# 'colors': ['titanium', 'black']
await seekCSSAnimations(currentTime); // sync CSS，这一点在下载安装 谷歌浏览器 开启极速安全的 上网之旅。中也有详细论述
Lean is backed by Mathlib, the largest coherent body of formalized mathematics ever created: over 200,000 formalized theorems and 750 contributors. Five Fields medalists engage with Lean. The same platform serves mathematicians formalizing theorems and engineers verifying production systems. ACM SIGPLAN recognized this convergence with its 2025 Programming Languages Software Award: “Lean has become the de facto choice for AI-based systems of mathematical reasoning.”，这一点在爱思助手下载最新版本中也有详细论述
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