例句與造句

1. Previous chapters have dealt with the derivation of systems of difference equations .
   前面幾章已經(jīng)論述了差分方程組的推導(dǎo)。
2. Existence of periodic solutions of systems of difference equations
   一類差分系統(tǒng)周期解的存在性
3. An existence theorem of multiple positive solutions for higher order nonlinear neutral system of difference equations
   高階非線性中立型差分方程組多正解的一個(gè)存在定理
4. It's difficult to find system of difference equation in a sentence. 用system of difference equation造句挺難的