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。
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。
Paul MacCready'sGossamer Condor, which made the first successful human-powered flight asrecently as 1977, was some improvement on these.
保罗·麦克格雷迪的“幻影神鹰号”却在飞行领域取得突破，它完成了自1977年以来首例成功的人力驱动飞行。
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。
It was as though Orville and Wilbur Wright had not just discovered powered flight but had built a plane with tray tables and a duty-free service.
那时赖特兄弟好像还没有发明动力引擎飞机，但用折叠餐桌和免税服务引擎的购物中心已经起飞。
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”。
Sunday's flight clears spaceship builder Scaled Composites to begin rocket-powered flights next year, and test flights in space in late 2011 or early 2012.
周日的飞行明确了宇宙飞船建造商s caledComposites将要在明年开启装有火箭发动机的飞行计划，在太空中的试验飞行将在2011年底或2012年初进行。
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。
Climbing during daylight hours, the prototype aircraft ultimately reached an altitude just short of 30, 000 meters, breaking records for non-rocket powered flight.
在白天爬升，原型机最终达到海拔30000米的高度，打破了非火箭动力飞行的高度纪录。
In those earliest days of powered flight, when so much had yet to be proven about aircraft technology and handling, almost any pilot was a test pilot of sorts.
在动力飞行，那些最早的日子，这么多尚未被证明是对飞机的技术和处理，几乎所有的驾驶员是各种各样的试飞员。
"Even a cursory examination of the evidence in representational arts shows that angels and cherubs cannot take off and cannot use powered flight," said Prof Wotton.
他说：“即使对具象派的艺术作品做一个粗略的检查，也足够找到证据，证明天使和胖乎乎的小天使无法起飞，也无法使用动力飞行的方法。”
“Even a cursory examination of the evidence in representational arts shows that angels and cherubs cannot take off and cannot use powered flight, ” said Prof Wotton.
他说：“即使对具象派的艺术作品做一个粗略的检查，也足够找到证据，证明天使和胖乎乎的小天使无法起飞，也无法使用动力飞行的方法。
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。
Even a cursory examination of the evidence in representational arts shows that angels and cherubs cannot take off and cannot use powered flight, "said Prof Wotton."
他说：“即使对具象派的艺术作品做一个粗略的检查，也足够找到证据，证明天使和胖乎乎的小天使无法起飞，也无法使用动力飞行的方法。”
Explanation: An example of solar-powered flight, NASA's Helios aircraft flew almost one hundred years after the Wright brothers' historic flight on December 17, 1903.
图片说明：这是太阳能为动力的飞行，国家航空航天局（NASA）的太阳神号出现在莱特兄弟的历史性飞行（1903年12月17日）大约100年后。
The dream of personalised flight is still vivid in the minds of many inventors, some developing cycle-powered craft, others pouring money into jetpacks.
个人飞行的梦想在许多发明家的脑海中仍然鲜活生动，一些人开发循环动力飞行器，另一些人则往喷气背包上大量投入资金。
Britain's first commercial flight, powered by sustainable biofuel, has taken off from Birmingham Airport.
英国首架使用环保生物燃料“地沟油”的商业航班近日从伯明翰机场始发，试飞成功。
The 1-x will climb about 40km (25 miles) into the sky during the powered phase of its flight, continuously measuring vehicle aerodynamics, controls and performance of the rocket's first stage.
战神一号X型将上升到约40公里(约25英里)的高空，在其动力飞行阶段，将不间断地对其运载空气动力学指标、火箭的第一阶段的控制和表现进行测量。
As for mission duration under powered space flight, Deep space 1 gets to keep that record for another few months until Dawn eclipses that record as well on August 10.
在动力航天的任务期限内，深空1号保持了几个月的记录，直到8月10号曙光号改写了记录。
In June, a Gulfstream G450 owned by Honeywell made the first biofuel-powered transatlantic flight when it flew from New Jersey to Paris using a 50-50 blend of Green Jet fuel in one of its engine.
今年6月，霍尼韦尔公司拥有的一架Gulfstream G450飞机进行了第一次使用生物燃料的跨大西洋飞行，飞机从新泽西起飞，在巴黎着陆，其中一台引擎使用的燃料50%为绿色航空燃油。
China joined the green jet age on Friday when an Air China 747 circled Beijing on a demonstration flight powered by a plant-based biofuel made by Honeywell UOP.
上周五，一架使用植物生物燃料的国航747飞机在北京上空进行了验证飞行，此种燃油由霍尼韦尔环球油品公司(HoneywellUOP)生产。这标志着中国迈入了绿色喷气机时代。
It is the first solar-powered plane to carry both a pilot and enough battery storage to power flight through the night.
这是第一架携载了一名飞行员和充足电池储量以提供夜间飞行动力的太阳能飞机。
A prototype solar-powered plane has made its first full test flight - coming closer to the goal of using solar energy to fly around the world.
一架以太阳能为能源的飞机已经圆满完成其首次试飞任务——其结果越来越接近我们利用太阳能环球飞行的目标。
The daily flight between Belgrade and Sarajevo takes 45 minutes to cover the 200-odd kilometres; it would be quicker in a plane that was not propellor-powered.
贝尔格莱德与萨拉热窝之间距离200公里，坐飞机只需45分钟，如果不是那种以螺旋浆推进的飞机，速度会更快。
The first manned day and night flight of a solar-powered aircraft has been postponed due to technical problems.
由于技术问题，第一架可实现载人昼夜飞行的太阳能飞机推迟首航。
He completed a 10-minute test flight recently with his jet-powered wing strapped to his back, flying for nearly 36km in Switzerland. (See photo).
最近，他在瑞士进行了10分钟的试飞，背负翅膀成功飞行近36公里。
Dr. Zefram Cochrane's experimental fusion-powered warp ship, Phoenix, makes first flight.
杰佛拉姆。科克伦的实验型融合驱动曲速飞船凤凰号第一次飞行。
Available power plays an important role in the design of a solar powered aircraft which is capable of continuous flight.
精确估算昼夜飞行太阳能飞机的可用功率是太阳能飞机设计中的重要问题之一。
Available power plays an important role in the design of a solar powered aircraft which is capable of continuous flight.
精确估算昼夜飞行太阳能飞机的可用功率是太阳能飞机设计中的重要问题之一。
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