The advantage of the balloon is that it will be cheaper than a space plane or rocket.
气球的优点是它比航天飞机或火箭便宜。
The Pentagon has repeatedly said that the space plane is simply a “test bed” for other technologies.
五角大楼曾多次表示，空天飞机仅是一个技术“试验床”。
On Friday, after three weeks in space, Kiah and Rilla finished work and left Ship OM-45 on a space plane to Kisangani.
这是个星期五，凯和瑞拉已经在太空飞行了三周。他们结束了工作，离开OM - 45号宇宙飞船，乘航天飞机飞往基桑加尼。
Virgin Galactic's space plane, the SpaceShipTwo, is expected to make its first test flights in the early months of 2010.
英国维珍银河公司宇宙飞船“太空船二号”将于2010年初进行首次试航。
The US Air Force's X-37B space plane is circling Earth and, although it is on a classified mission with an officially unpublished orbit, sky watchers have spotted it.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。
Qian wrote a proposal for a winged space plane that the magazine Aviation Week and Space Technology, in 2007, called an inspiration for research that led to NASA's space shuttle.
1949年，钱先生撰写了一篇有关有翼航天飞机的建议书，《航空周刊与空间技术》杂志2007年称该建议书启发了美国宇航局开展航天飞机研究。
In 1949, Mr. Qian wrote a proposal for a winged space plane that the magazine Aviation Week and space Technology, in 2007, called an inspiration for research that led to NASA's space shuttle.
1949年，钱先生撰写了一篇有关有翼航天飞机的建议书，《航空周刊与空间技术》杂志2007年称该建议书启发了美国宇航局开展航天飞机研究。
The reason for noncoplane generated by space four latera during machining is analysed. The way for rational marking standard space plane dimensions and its theoretical bases are expounded.
分析空间四边平面加工过程中产生不共面的原因，提出了合理标注空间平面尺寸的方法并阐述了其理论根据。
Aerospace manufacturer, ChinaRocket, said it hoped to fly passengers to an altitude between 120 and 140 kilometres (75 and 87 miles) with a large space plane from 2025, reported People's Daily Online.
中国长征火箭有限公司透露其希望从2025年开始，用大型太空飞机把乘客送上120-140公里的高空。
Aerospace manufacturer, ChinaRocket, said it hoped to fly passengers to an altitude between 120 and 140 kilometres (75 and 87 miles) with a large space plane from 2025, reported People's Daily Online.
中国长征火箭有限公司透露其希望从2025年开始，用大型太空飞机把乘客送上120-140公里的高空。
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