一: one阶: steps; stairs逻辑: logic一阶逻辑表达式: first-order logic expression一阶逻辑的不可判定性: the undecidability of first-order logic阶逻辑: order logic一阶逻辑表达的公理规格说明: specification in first-order logic-axioms一阶逻辑表达的术语规格说明: specification in first-order logic-terminologyn阶逻辑: n order logic二阶逻辑: second order logic; second-order logic高阶逻辑: high order logic; higher order logic; higher-order logic; highor-order logic零阶逻辑: zeroth-order logic一阶动态逻辑: first-order dynamic logic一阶模态逻辑: first-order modal logic一阶谓词逻辑: first order predicate logic; first-order logic; first-order predicate logic一阶: first order; first-order; single(-)order第一阶: prime一阶;一级: first order一阶的: single order一阶法: first-order method一阶谷: first order valley一阶矩: first moment一阶条: first―order condition一阶植: first-order value一阶值: first-order value