即使尼克松的老板阿布·维尔县督学埃文·伦道夫对这种做法也表示不安。
Even Nixon's boss, Abbeville County superintendent Ivan Randolph, is unsettled by the practice.
在矩形网格上的九点差分近似的正确公式。使用它，在均质情况下，对拉普拉斯方程、布阿松方程和热传导方程可以构造出高阶精度的差分近似。
Under homogeneous conditions, the application of this equation may give a differential approximation of high order accuracy for Lapace equation, Poisson equation and heat conduction equation.
应用推荐