This paper investigates the integrable inhomogeneous generalized Heisenberg ferromagnet model by using the prolongation structure theory.摘要利用延拓结构研究了可积的非均匀推广的海森堡铁磁链方程.Existence, approximation and stability of integrable m...
I pushed through the crowds and on to the escalator.我挤出人群,踏上了自动扶梯。I don't like escalator — I'll climb the stairs.我不喜欢自动扶梯,我要爬楼梯.You can ride the escalator up but have to descend on foot.你可以搭电梯上去,但要自己走下来....