基本解释正平衡點同根派生 extiction相关词英汉例句Keywords Impulsive differential equation;discrete population dynamical system;stroboscopic map;global stability;extiction;permanence;complexity; 脈沖徽分方程;離散種群動力系統;頻閃映射;全侷穩定性;滅絕;持續生存;複襍性;extiction更多例句