As the young bird matures, such controlled descent gradually gives way to powered flight.
一旦幼鸟成熟，类似这样的可控降落就会演变成为动力飞行。
On December 17, 1903, the Wright Brothers embarked on the first sustained, heavier-than-air, man-powered flight aboard the Wright Flyer.
1903年12月17日，莱特兄弟驾驶自己制造的第一架飞机“飞行者1号”，在美国北卡罗莱纳州的基蒂霍克海滩，进行了首次有动力驱动的持续飞行。
John McCurdy pilots Alexander Graham Bell's experimental tetrahedral kite, the Cygnet III, which left the ground via powered flight in March 1912.
1912年3月，约翰·麦柯迪试驾亚历山大·格雷厄姆·贝尔的实验性四面体风筝，通过动力飞离地面的“小天鹅3号”。
The testing, which began in June 2007, put the MALD through a series of flight profiles including jettison and powered flight tests from both F-16 and B-52 aircraft.
这次测试开始于2007年6月，在飞行测试中，使用了F-16战斗机和B-52轰炸机作为载机，对MALD进行了各种飞行轨迹的测试，包括抛射和动力飞行测试。
He thinks microraptor used its hind wings only for gliding, folding them out of the way for powered flight.
他认为，顾氏小盗龙仅仅用后翼来滑翔，在加力飞翔时，便折叠起来，以免挡道。
Should all go according to plan, Yiqing will bring Mozi to the Birdman Rally in Japan, where he hopes to break the duration record for human-powered flight.
如果一切按计划进行，毛一清还打算把“墨子”带去日本的鸟人大赛，他希望在那里打破人力飞行器飞行时间的记录。
Should all go according to plan, Yiqing will bring Mozi to the Birdman Rally in Japan, where he hopes to break the duration record for human-powered flight.
如果一切按计划进行，毛一清还打算把“墨子”带去日本的鸟人大赛，他希望在那里打破人力飞行器飞行时间的记录。
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