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An R/C helicopter is a heavier-than-air model aircraft that derives all of its lift and horizontal propulsion from a power driven rotor system rotating about a nominally vertical axis.

一个 R /C遥控直升飞机是一种重於空气的模型飞机可以被垂直上升下降、水平移动的旋翼系统旋转於一个名义上为轴之上。

Glider: Nonpowered heavier-than-air craft capable of sustain ed flight.

滑翔器：没有动力能持续飞行的重于空气的航空器。

Heavier-than-air flying machines are impossible.

比空气重的飞行机器是不可能的。

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。

Geroge Vaykey developed the concept of heavier-than-air flight.

乔志 维奇改良了出了顶端为弧型的概念风筝。

An R/C helicopter is a heavier-than-air model aircraft that derives all of its lift and horizontal propulsion from a power driven rotor system rotating about a nominally vertical axis.

遥控直升机是一种自重大於空气，且通过一套有互相垂直旋转面的动力旋翼系统来实现升降和平移机动的飞行器模型。

On December 16,1902,Orville Wright, an American, flew safely in a heavier-than-air machine for twelve seconds, He and his brother Wilbur had made a lot of experiments and had taken immense trouble to study the art of flying in gliders before they attempted to fly their aeroplane.

1902年11月16日，美国人奥维尔·莱特乘坐一架比空气重的飞机安全地飞行了十二秒钟。他和他的兄弟威尔伯在试飞之前进行了多次试验，不辞辛苦地用滑翔机钻研飞行技术。

Some of the glider experiments conducted by Otto Lilienthal and slightly later by Octave Chanute were so strikingly successful that it seemed a certainty that someone would certainly succeed in making a powered, controlled, heavier-than-air flight within a decade.

部分的滑翔机实验所进行的奥托利林塔尔和轻微稍后由八度音chanute如此惊人的成功，似乎肯定有人一定会成功地使一动力，控制，加重比空气飞行了十多年。

The apt description stems from the choking, heavier-than-air toxic gases that seep from the planet's innumerable active volcanoes.

这一称呼相当准确，因为在这颗行星上有不计其数的活火山，它们会释放出令人窒息的毒气。

And even before the Wright brothers succeeded in building a heavier-than-air flying machine, the physicist and inventor Nikola Tesla speculated that it would be possible to build a remote-controlled flying bomb—a premonition perhaps of German V-1 flying bombs and modern cruise missiles.

而且，即使在赖特兄弟成功建造成重于空气的飞行机之前，当时的物理学家与发明家尼克拉·特斯拉就设想，研制一种远程操控的自动导航导弹将是可能的——这种设想可能是德国V-1自动导航导弹与现代巡航导弹的前兆。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐