Approximate expressions describing their broadening, compressing, attenuation and amplification are given.
给出了描述它们展宽、压缩、衰减和放大的近似表达式。
After giving their approximate expressions, we focus on the space time distribution of perturbation of magnetic field.
在求得其近似解后，着重讨论其扰动磁场的时空分布。
Approximate expressions for the Taylor bubble velocity are proposed, and shown to be in good agreement with the experimental data.
提出了液体流动为层流和紊流时气泡上升速度的表达式，研究结果与实验数据进行比较，符合较好。
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