在微信家族群里，这些长辈也依然是核心人物，他们发的消息，会得到大家的积极回应，他们说的话，大家也都会听从；而那些在家族里威望不高、没有权力的人，发的消息，很少有人回应，说的话，也很少有人在意。这种权力关系，在家族群里体现得淋漓尽致，也让亲情差序格局变得更加复杂。比如，大伯在家族群里说，今年过年家族要聚餐，让大家都回来，大家都会积极响应，说一定会回来；而如果是一个普通的家族成员说要组织聚餐，大家可能会找各种借口推托，不会积极响应。
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.”
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Fridges: inventory management, recipe recommendations for refrigerated ingredients, and reorder automation for subscription services
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