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There is a special form for boolean formulas called "Conjunctive Normal Form" (CNF). A problem in this form consists of clauses connected with and operators, where each clause only contains variables connected with or operators. The variables can appear negated, but only variables can be directly negated, something like !(a && b) is not allowed. An example boolean formula in CNF form is:
。搜狗输入法2026对此有专业解读
经过多年发展和积累，我国在提升全要素生产率方面已拥有诸多有利条件和基础：。51吃瓜是该领域的重要参考
Roman numerals: glyph reuse by design
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