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。

A space plane is different from an ordinary plane.

航天飞机与普通飞机不同。

The orbital space plane promises to be much safer than the shuttle.

轨道太空飞机应该较太空梭来得安全。

An alternative to the space shuttle was the original space plane of the Eisenhower era.

在艾森豪·威尔时代，最初的设想是空天飞机，而不是航天飞机。

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”。

The 29-foot-long space plane, much smaller than the space shuttles, can stay in orbit for up to nine months.

这位29英尺长的空天飞机，比航天飞机更小，可以留在轨道上长达9个月。

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。

An application example is enumerated that the space plane parameters are confirmed based on invariance of cross radio.

列举一个应用实例，利用交比的不变性确定空间平面参数。

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。

Wonderful is that the design of space many ingenious use of the "space plane Visual" approach, the perfect combination of device and image display.

设计的精彩之处在于空间中多处巧妙的运用了“空间平面视觉”手法，将装置与形象展示完美结合。

The US Air Force's X-37B space plane is circling Earth and, although it is on a classified mission with an officially unpublished orbit, sky watchers have spotted it.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。

To study the intersection visibility of two general place planes, this paper set the planes as two faces of front and backs from the point of projection character of a space plane.

为了研究两平面相交可见性的规律，从空间一个平面的投影特点入手，将平面分别设定为正面、背面两面，讨论平面图形各顶点投影顺序与平面正面、背面的投影所具有的内在规律。

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。

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。

Through contrast, analysis, expounding and proving several machining methods for both space plane of front car housing from technical and economic angle gains the optimum processing plan.

针对前桥壳体的两个空间平面的加工问题，从技术和经济的角度，时比、分析、论证多个加工方法，获得较佳工艺方案。

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。

Plasma through the plane to medium vision with massive particles through path minkowski space plane path of the mathematical description of consistent, contain the space and time dimension.

等离子通过异向介质的平面路径与大规模粒子通过闵可夫斯基空间的平面路径的数学描述一致，其中都包含了空间和时间的维度。

The relationships between traffic parameters, such as the ramp flow, speed, density and mainline flow at the ramp junction, are established by mapping time-space plane to speed-density plane.

积分后，得到了匝道单车道流量与匝道连接处速度、密度和流量的理论关系模型。

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。