The immediate cause of the problems is the behaviour of the jet stream, a band of high-level wind that travels east around the world and influences much of the weather below it.
引起这些问题的直接原因是急流[注1]的运动方式 ----在高空、绕地球向东流动并能给下面的天气造成很大影响的一股风。
The aim of both teams is to tap into high-altitude wind, which is an energy source that is more abundant and reliable than the ground-level wind on which normal turbines depend.
两个研究小组的目的是一致的：利用更加丰富、稳定的高海拔风能发电，而普通的涡轮发电机则依赖于地表风能。
The experimental studies on two wing body junctions and wakes were carried out in a low turbulence level wind tunnel.
绕两个翼型-平面的角区流动及其尾迹的实验是在低湍流度风洞中完成的。
A typical low-level wind shear of thunderstorm activates long periodic oscillation of an aircraft, causing tracking deviation of the aircraft.
典型尺度的雷暴低空风切变以长周期振动频率激励飞机，使其偏离预计下滑航迹。
In this paper, the multi-level wind velocity in the nocturnal steady state PBL is analysed, using the data of the 325 meter meteorological tower and acoustic sounder.
本文利用325米气象塔及声雷达探测资料分析了夜间平稳天气条件下行星边界层中风速出现多极值的现象。
Convective cells formed at high altitude plots firstly and then spread to lower altitude area, and the speed and directions of cells 'spread depend on terrain factors and upper level wind.
对流单体主要在海拔较高的山脊处生成，并向低海拔地区移动传播，传播的速度和方向主要与地形和中高层风速风向有关。
Convective cells formed at high altitude plots firstly and then spread to lower altitude area, and the speed and directions of cells 'spread depend on terrain factors and upper level wind.
对流单体主要在海拔较高的山脊处生成，并向低海拔地区移动传播，传播的速度和方向主要与地形和中高层风速风向有关。
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