Centralized invariants of business logic. If two modules are found to keep the same invariant, they should be merged. It’s difficult to keep invariants in sync between modules.
第二条 治安管理工作坚持中国共产党的领导，坚持综合治理。
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В России предупредили о скорой нехватке вагонов08:46
Error handling is an important, but often neglected, part of programming and user experience.
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