就在1944年圣诞节前Ho 2 - 29原型完成了一次成功试飞。
A Ho 2-29 prototype made a successful test flight just before Christmas 1944.
俄国的苏霍伊t - 50隐形战机原型去年刚进行了首次试飞，预计将在4年后服役。
Russia's Sukhoi T-50 prototype stealth fighter made its maiden flight last year and is due to enter service in about four years.
在不远处的开发实验室，马特·班尼特(MattBennett)向我展示了另一架飞机原型，这架飞机早已成功试飞过。
In a nearby development lab, Matt Bennett showed me another of the prototypes which have already flown successfully.
莱特兄弟在1903年首先试飞成功的原始飞机，是现代飞机的原型。
The crude craft in which the Wright brothers made the first successful flight in 1903 was the prototype of the modern airplane.
中国隐形战斗机原型机进行了首次试飞。
China has carried out its first test flight of a prototype stealth fighter jet.
目前这还只是一架原型机，不过瑞士的一名飞行员架着它完成了一次试飞。测试人员称，飞机起飞十分平稳。
It's only a prototype right now but a man in Switzerland took it for a test flight and the take-off, they say was, pretty smooth.
两家公司计划先建造用于地面试验的原型机，并在2020年之前点火测试，随后在2025年以前完成原型机试飞。
The companies plan to have a ground-based demonstrator engine prototyped and firing by 2020 and a further prototype flying on a test aircraft by 2025.
两家公司计划先建造用于地面试验的原型机，并在2020年之前点火测试，随后在2025年以前完成原型机试飞。
The companies plan to have a ground-based demonstrator engine prototyped and firing by 2020 and a further prototype flying on a test aircraft by 2025.
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