一类: of the same class; of the sa ...平面: plane; two dimensions; flat ...的: 4次方是 The fourth power of 2 i ...极限: the limit; the maximum; the ...环: ring; hoop存在: exist; be性: nature; character; dispositi ...一类非线性方程的有界性与极限环的存在性: existence of limit cycles and boundedness of a class of nonlinear equations一类平面微分系统极限环的存在唯一性: the existence and uniqueness of limit cycles of a class of plane differential systems一类平面微分系统极限环的存在惟一性: the existence and uniqueness of limit cycles for a class of planar differential systems微分方程的极限环: limit cycle of a differential equation一类非线性微分方程极限环的存在性: the existence of limit cycles of some non-linear differential equations二次方程的: quadratic一类生化反应系统微分方程模型的极限环: limit cycles in a class of biochemistry reaction systems二次方程: binomial equation; quadratic equation; quadraticequation; quadric equation二次方程式: quadratic equation全二次方程: complete quadratic (equation)双二次方程: biquadratic equation隐二次方程: implicit quadratic equation一类含小参数微分方程鸭解的存在性: existence of duck solutions of a kind of differential equations with small parameter平面二次曲线: plane quadratic curve二次方程式论: quadratics二元二次方程: quadric equation in two variables完全二次方程: complete quadratic equation; completequadraticequation一元二次方程: quadratic equation
