例句與造句

1. Abstract : in this paper , the authors study the initial value problems of a class of weakly nonlinear differential equation . the first and the second order approximate solutions are obtained . their accuracies are high and the more the approximate order is high , the more the accuracy is high . if the regular perturbation method is used to solve the same problems , then , when the independent variable is big , so is the error of the solution
   文摘:用插值攝動(dòng)法1研究一類弱非線性常微分方程的初值問(wèn)題，得到了一級(jí)及二級(jí)近似解.解的精度很高，并逐級(jí)提高.如果用正則攝動(dòng)法求解此類問(wèn)題，則當(dāng)自變量較大時(shí)，誤差很大
2. It's difficult to find regular perturbation in a sentence. 用regular perturbation造句挺難的