The Aero L-29 "Dolphin" is a Czechoslovak training aircraft that made its first flight in April 5, 1959.
1959年4月5日，捷克斯洛伐克教练机l - 29海豚首飞。
The rocket made its first flight in 2004 and is capable of launching payloads of up to 24 tons into low-Earth orbit and 11 tons toward the geosynchronous orbits used by communications satellites.
重型火箭在2004年进行首次发射，它可以将24吨重的负载发送到低地球轨道，也能将用于通讯卫星的11吨重的载荷送入地球同步轨道。
The world's first jet-propelled aeroplane, with engine designed by Dr Von Ohain, made its first flight, at Marienehe in North Germany.
世界第一架喷气式飞机在德国北部的马里奈赫作第一次飞行。飞机引擎为冯·奥海因博士所设计。
Last Saturday, the American X-43A airplane made its first flight.
上周六，美国的X四十三飞机成功完成了首次飞行。
Last Saturday, the American X-43A airplane made its first flight.
上周六，美国的X四十三飞机成功完成了首次飞行。
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