例句與造句

1. then, letting u ( i \ Delta x, \, n \ Delta t ) = u _ { i } ^ { n } \,, the equation for Crank Nicolson method is a combination of the forward Euler method at n and the backward Euler method at " n " + 1 ( note, however, that the method itself is " not " simply the average of those two methods, as the equation has an implicit dependence on the solution ):
2. It's difficult to find forward euler method in a sentence. 用forward euler method造句挺難的