A short walk in space,but a great leap forward for a nation. At 9:07 pm,Sept.25,the ShenzhouⅦspacecraft was lifted off ......

为了确定全程跟踪卫星或飞船的测控站数量,在不考虑地球自转影响和考虑地球自转影响的情况下,使用几何方法分别建立了对卫星或飞船......

For the purpose of ensuring normal operations of Shenzhou (SZ) series of manned spacecrafts and cosmonauts' safety, ......

张鷟为初唐才高位低之名士，声望远播海外。其籍里深州陆泽县，在今河北衡水深州市。其名鷟，由儿时梦紫文鸑鷟而得来。表字文成，与单名鷟......