ordinary differential equation短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 常微分方程 The sufficient conditions of oscillation of solution for a class of neutral functional differential/span> equation is weakened by comparing theorem of ordinary differential equation. 利用常微分方程的比较定理，减弱了一类中立型泛函微分方程解振动的充分条件。 cnki