3 . we construct liapunov functions with separable variables and prove results on global stability with respect to partial variables for nonlinear and non - autonomous systems with separable variables 三、利用分離變量的liapunov函數(shù),研究了非線性非自治分離變量系統(tǒng)關(guān)于部分變?cè)娜址€(wěn)定性,將一般自治系統(tǒng)的相應(yīng)結(jié)果推廣到非自治系統(tǒng)。