| 1. | 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。 |
| 2. | The first successful sustained powered flights in a heavier - than - air machine were made here by wilbur and orville wright on december 17 , 1903
1903年12月17日，莱特兄弟第一次用比空气重的飞行器进行了有动力的持续飞行。 |
| 3. | The first succes * * * ul sustained powered flights in a he * * * ier - than - air machine were made here by wilbur and orville wright on december 17 , 1903
1903年12月17日，莱特兄弟第一次用比空气重的飞行器进行了有动力的持续飞行。 |
| 4. | It took 10 , 000 years to get from the dawn of civilization to the airplane but just 66 years to get from powered flight to a lunar landing
从文明初启到飞机发明，我们花了10000年，但只花了66年就从动力飞行器进展到登陆月球。 |
| 5. | 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。 |
| 6. | This learning adventure tells the amazing story of flight - human and animal . kids can learn about aerodynamics , the history of human - power flight , birds and insects through hands on activities
这个富含学习性的历险之旅,介绍人和动物的飞行故事.通过亲身参与的活动,孩子们可以学习空气动力学,以及人工动力飞行,鸟和昆虫的飞行历史 |
| 7. | Members of this school think that powered flight developed as a natural extension of gliding ( such controlled falling is used as a way of travelling from tree to tree by several arboreal species today )
这个学派的成员认为，这让鸟的滑行能力自然而然地进化到飞行能力（今天的一些树栖物种从一棵树到达另一颗树就使用了这种能自控的下滑能力） 。 |
