Another includes experimental aircraft, such as the X-37, a cut-down, unmanned descendant of the space shuttle.
另一项计划则包括研制诸如X-37这样的实验飞机，它是美国航天飞机的简化及无人驾驶版本。
Experimental aircraft
原声例句
经济学人-科技
世界奇趣图谱
This was achieved by a NASA experimental hypersonic aircraft called the X-43.
这是通过名为 X-43 的 NASA 实验性高超音速飞机实现的。
奇趣工程百科
The bomber has frequently served as a 'mothership' for air-launching experimental aircraft such as the X-15 and X-43 over the years.
多年来，该轰炸机经常充当 X-15 和 X-43 等空射实验飞机的“母舰”。
中文百科
试验机
试验机泛指担任试验性职工作或者是任务的飞机，这些飞机包括专门设计用来验证理论或者是装备，或者是改装之后进行需要在飞行中进行，但是与飞机本身无关的试验。
无论是军用机或者是民用飞机，许多设计上依询的理论和概念都需要透过实际飞行来验证，无法单纯的利用风洞或者是电脑计算的结果来决定。因此针对需要的试验项目特别设计的飞机在航空发展史上担任很重要的角色。譬如美国为突破音障而设计的X-1以及一系列以X开头的试验机，在不同时期分别担任试验飞行的项目，譬如验证可变后掠翼、垂直起降或者是超过5马赫的飞行状态。
英语百科
Experimental aircraft 试验机
An experimental aircraft is an aircraft that has not yet been fully proven in flight. Often, this implies that new aerospace technologies are being tested on the aircraft, though the label is more broad.
The term "experimental aircraft" is also sometimes used to refer to aircraft flown with an "Experimental" category airworthiness certificate. In the U.S. this includes most homebuilt aircraft; many of which are based on conventional designs and hence are experimental only in name.