In this thesis , the model of launch dynamics is researched . it consists of ship - based launch and ground - based launch 本文对导弹发射动力学进行了研究,主要分两大部分,舰载发射和地面发射。
On january 11 , china successfully destroyed one of its orbiting weather satellites using ground - based medium - range ballistic missiles 在1月11号,中国成功的用陆基中程导弹击毁了自己的一颗气象卫星。
Yet recent hubble images and ground - based observations find that the positions of the arcs have shifted little in the past 15 years 然而近来从哈伯望远镜和地面观测却发现,这些圆弧于过去15年来变动不大。
Over the years , considerable progress has been made in the development of detection systems , both ground - based and on - board aircraft 因为其危险的缘故,任何机师在起飞和降落的时候都避免遇到微下击暴流。
Prior to the 1960s knowledge of the atmosphere above about 30 km was based largely on inferences from ground - based observations 在60年代以前,人们关于30公里左右以上的高空大气知识主要是根据地基观测推断得到的。