It lurks in the sky and when the time is right , it rushes towards the ground causing significant downdraughts and changes in head wind . microburst first coined by t . fujita , is so dangerous that every pilot would try to avoid it , especially during take - off and landing 隐藏在天空中，只待时机成熟就冲向地面，造成显著的下沉气流和逆风变化，这就是微下击暴流。微下击暴流这个现象的名称由藤田首创。
On the morning of the 15th of september when young rostov in his dressing - gown looked out of window he saw a morning which was all the heart could desire for hunting . it looked as though the sky were melting , and without the slightest wind , sinking down upon the earth 九月十五日清早，年轻的罗斯托夫披上了一件长衫，向窗外望望，他一眼望见，比这天早上更适宜于狩猎的天气是没有的了：天空好像在融化，风停了，天幕向地面拉下来。
Imagine life as a game in which you are juggling some five balls in the air . you name them work , family , health , friends and spirit and you ’ re keeping all of these in the air . you will soon understand that work is a rubber ball . if you drop it , it will bounce back 假设人生就像一个游戏，你要同时抛耍五个球。这五个球分别叫做工作，家庭，健康，朋友和心情。你得尽力使每个球都不落地，你会很快明白工作是个橡皮球。如果你把它抛向地面，它会弹回来。
The foggy sky still seemed falling imperceptibly and regularly down on the earth ; the air was still and warm , and there was no sound but now and then the whistle of a huntsman , the snort of a horse , the clack of a whip , or the whine of a dog who had dropped out of his place 雾霭弥漫的天空，仍旧不知不觉地不疾不徐地向地面拉下来天空中一片沉寂，而且和暖，无声无息。有时可以听见猎人的唿哨声，马的响鼻声，或者是离开原地乱走的猎犬刺耳的吠声。
This instrument can automatically send the information from the irradiation belts based on the detecting results , which will provide an foundation for the reinforcement of aircraft irradiation resistance . a multi - functional spectrometer - identificator is developed to measure fluxes and spectra of protons , alpha particles , oxygen and iron ions in space 根据要求自动向地面发送空间不同位置的带电粒子通量和它与能量关系的讯息，主要用于近地空间辐射环境的探测和监测，为空间飞行器的抗辐射加固提供依据。
This means that the dielectric property changes with height and allows a slight increase in the speed of a radio wave as we move upwards through the atmosphere . this in turn means that if a radio wave moves away from the earth at an angle less than 90 degrees , then the upper part of the wave travels faster than the lower part . therefore even under normal conditions this can in effect bend , or refract , the wave back down to earth 其中一种显著的现象是：在一定的气象条件下，在大气边界层尤其是在近地层中传播的电磁波，受大气折射的影响，其传播轨迹弯向地面，当曲率超过地球表面曲率时，电磁波会部分地被陷获在一定厚度的大气薄层内，就好像电磁波在金属波导管中传播一样，称为大气波导传播，形成波导传播的大气薄层称为大气波导层。
With the improvement and perfection of the remote sensing technology , the rise and the development toward ground resolution and spectrum resolution of remote sensing devices for plenty of remote sensing data have been seen , from which derive an obvious problem that how so big a mass of data can be transmitted to the surface from an outer space platform 随着遥感技术的不断发展和完善，获得大量遥感数据的遥感器不断涌现，并且向地面分辨率和光谱分辨率两个方向迅速发展，由此产生的一个明显问题是如何从空间平台上传输这样庞大的遥感数据到地面。
