例句與造句

1. only a few have studyed family of problems . we extend the work in [ 26 ]-[ 27 ] . first, under the classical assumption that ( t ) ( t ), we consider the periodic boundary value problem, when / is independent of x ( t ) . second, under the case that ( t ) ( t ), we consider the periodic boundary value problem and describe a constructive method which yields two monotone sequences that converge uniformly to extremal solutions to periodic boundary value problems, when / depends on x ( t )
   氣t)這一項的邊值間題更是如此，基于此，我們把微分方程方面的結(jié)果推廣到時間模上.首先考慮在下解小于上解的情況下，f不含。(t)這一項的周期邊值問題，而后在下解大于上解的情況下，考慮了含有、(t)這一項的周期邊值問題，描述了一種構(gòu)造性方法，構(gòu)造了兩個單調(diào)序列其一致收斂到二階周期邊值問題的極值解
2. It's difficult to find classical assumption in a sentence. 用classical assumption造句挺難的