例句與造句

1. The tangential derivatives on the outer curves are nowhere vanishing by the Cauchy-Riemann equations, since the normal derivatives are nowhere vanishing.
2. By the Cauchy-Riemann equations these tangential derivative are up to a sign the directional derivative in the direction of the normal to the boundary.
3. where we have use the fact that the tangential derivatives of \ delta g _ { \ alpha \ beta } vanish on \ partial \ mathcal { M }.
4. It's difficult to find tangential derivative in a sentence. 用tangential derivative造句挺難的