总可以做到使得简并的本征函数是正交的.It can always be arranged that degenerate eigenfunctions are orthogonal.此外, 这三个解全都是互相正交的.Further, these three solutions are all orthogonal to each other.和两个不同的主胁变相对应的主方向是互相正交的.The principal directions ...
At best Nella would be an invalid; at worst she would die.内拉往好里说会落下残疾，往坏处说可能会生命不保。Nella stood at the end of the gangway.内拉站在舷梯尽头.He looked fixedly at Nella and started back.他目不转睛地看着内拉,接着往后一缩....