boussinesq approximation meaning in English

博欣内斯克近似
布西涅斯克近似
布辛涅斯克近似

In this thesis , there are three parts . first , we make the boussinesq approximation and study the effects of non - thermal wind and its spatial distribution on the superiority development of mesoscale symmetric disturbance
主要进行了三个方面的工作：首先采用准boussinesq近似模式，研究了基流非热成风因子及其空间分布对中尺度对称扰动优势发展的影响问题。
When the atmosphere system occurs nonlinear instability in the subcritical instability region , it will split more wave resolutions than in the supercritical instability region and need more time to occur the subcritical instability , therefore it may have effect on the form and development of some synoptic system . 3 . starting from nonlinear equations on the f - plane containing frictional dissipation under the boussinesq approximation
大气系统在亚临界不稳定区发生非线性不稳定时，会比超临界不稳定区分裂出更多的波动解，而且发生亚临界不稳定需要更长的时间，因此它可能在某些天气系统的形成和发展过程中起到一定的作用。