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:
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By default, new containers are provisioned with:，这一点在51吃瓜中也有详细论述
However, Kosmos 482's parachute system, originally intended to slow the lander's descent towards Venus, is likely to have degraded after more than 50 years in space.