The US Air Force's X-37B space plane is circling Earth and, although it is on a classified mission with an officially unpublished orbit, sky watchers have spotted it.
美国空军的X-37B太空船当时正在环绕地球，在某个官方未公开的轨道执行秘密任务。天空观察者发现了它。
The plane was flown by NASA for 19 years as a "flying test bed, " according to the Smithsonian National Air and Space Museum, as well as a chase plane.
这架飞机是飞往美国航天局19为“飞行试验台年，”根据史密森国家航空航天博物馆，以及一个追逐飞机。
The enemy plane was shot down the moment (that) it intruded into our air space.
这架敌机一侵入我国领空就被击落。
LTD(IHI) is conducting development study of Air Turbo-Ramjet(ATR) engine, which is one of the most preferable candidate as an air breathing propulsion system of future space plane.
日本航空宇宙技术研究所和石川岛播磨重工业公司目前正在开展这方面的研究工作。
The plane completely vanished from radar one minute before it entered Vietnam's air traffic space, according to Lt. Gen. Vo Van Tuan, deputy chief of staff of the Vietnamese army.
据越南陆军副参谋长透露，航班在进入越南航空管辖区域前一刻便彻底从雷达信号上消失。
The plane completely vanished from radar one minute before it entered Vietnam's air traffic space, according to Lt. Gen. Vo Van Tuan, deputy chief of staff of the Vietnamese army.
据越南陆军副参谋长透露，航班在进入越南航空管辖区域前一刻便彻底从雷达信号上消失。
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