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:
截至记者发稿，洛阳钼业股价报17.92元/股，上涨1.93%。今年以来，公司股价累计上涨近180%。
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Germany-headquartered firm Schaeffler is currently working on actuators for British robotics company Humanoid. Schaeffler's goal is to develop components that allow for highly energy efficient, well-controlled movement, which is essential for competent bipedal robots to move and work safely alongside humans.，详情可参考搜狗输入法2026
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