The nonparallel linear stability of the two-dimensional and three-dimensional disturbance waves are studied by the parabolized stability equation which is developed in recent years and the local method based on the Landau expansion. 采用近年来新发展的抛物化稳定性方程和利用Landau展开式的局部法方程,分别研究二维和三维线性非平行流稳定性问题。