Sandstorms and high level jet stream always occurred together.

沙尘暴与高空急流总是相伴出现。

This is why we talk about the 'jet stream' in the upper atmosphere.

这就是为什么我们谈论'喷流'的上层大气。

Studies the jet stream field under different point angles and boundary conditions.

研究了不同圆锥顶角及边壁条件下射流流场。

At the beginning of a cycle the jet stream is found, like sunspots, in mid-latitudes.

在一个活动周期开始的时候，就可以找到高速气流，像中纬度地区的太阳黑子。

The main affecting systems include landfall typhoon, low-level jet stream and west trough.

主要影响系统为登陆台风、西风低槽和低空急流。