Objects, like bits of old space rockets or satellites, move around the planet at very high speeds, so fast that even a very small piece can break important satellites or become dangerous to astronauts.
一些物体，比如一些旧的太空火箭或卫星碎片，在地球上以非常高的速度运动，速度如此之快，以至于一个非常小的碎片都能破坏重要的卫星或对宇航员造成危险。
宇宙火箭，潜水艇。
Such machines are called space rockets.
这种机器就称为宇宙火箭。
Space rockets are being sent up all the time.
现在随时都有火箭发射。
Space rockets are being sent up all the time .
现在随时都有火箭发射。
Computers and space rockets seemed impossible a hundred years ago.
电脑和火箭在一百多年前看起来也是不可能的。
I have even been put into space rockets and sent to the Moon and Mars.
我甚至被安装在太空火箭中并发射来探测月球和火星。
I have even been put into space rockets and sent to explore the Moon and Mars.
我已经被放进太空火箭并被送去探测月亮和火星。
I have even been put into space rockets and sent to explore the Moon and Mars.
我也被置入空间火箭，被送去探索月亮和火星。
Observers say the test will have to be repeated several times to prove that it is possible to reuse space rockets.
观察家认为，必须进行多次重复试验来验证重复使用太空火箭的可能性。
That may not seem possible now, but computers, space rockets and even electric toothbrushes seem impossible a hundred years ago.
那现在看起来似乎是不可能的，但是电脑，宇宙飞船和电子牙刷在一百年前看起来是不可能的。
That may not seem possible now, but a hundred years ago computers, space rockets and even electric toothbrushes seemed impossible.
这可能似乎并不可能，但百年前的计算机，航天火箭，甚至电动牙刷似乎是不可能的。
That may not seem possible now, but computers, space rockets and even electric toothbrushes seemed impossible a hundred years ago.
那不也许现在似乎可能，但是计算机、太空火箭，甚至电牙刷在一百年前似乎都不能。
Iridium, usually used in space rockets, is ten times rarer than platinum and highly resistant to heat so theoretically it can be dropped it into lava, and it will not melt.
铱，通常被用于太空火箭，比铂金稀有十倍并且高度耐热，因此理论上即使它掉进岩浆中也不会熔化。
His theory helped the United States developed a ground-and space rockets, and he in the missile and spacecraft aerodynamics and navigation systems, has made an outstanding contribution.
他的理论帮忙美国研制了地对地导弹和宇宙火箭，并且，他在导弹和宇宙飞船空气动力学和导航系统方面作出了杰出的贡献。
At Space Camp, trainees can earn their Space Exploration badge as they build and fire model rockets.
在太空营，学员可以制作和发射火箭模型，以此获得太空探索徽章。
Two of them have already been sent up into space, using rockets and then later filled with air.
其中两个已经坐上火箭被送入太空，氧气也已备足。
People can only fly rockets into space right now.
现在人们只能把火箭送入太空。
The rockets take astronauts and man-made satellites into space.
火箭把宇航员和人造卫星送入太空。
From his father, he knew that scientists make rockets to carry things into space, and spaceships are used to carry people through space.
从他父亲那里，他得知科学家们制造火箭来把东西送入太空，而宇宙飞船是用来载人穿行太空的。
In space, however, these rockets are inefficient-they burn through huge quantities of fuel while generating more thrust than necessary.
但是，在太空这些火箭的效率很低——它们通过燃烧大量的燃料，产生了比需要更多的推力。
For all its flaws, it was a bold idea: to replace the throw-away rockets that began the space age with a truck that could go in and out of orbit routinely.
鉴于它的所有缺点，这是个大胆的构想：以能够例行进出轨道的运载工具取代一次性的火箭而开启太空时代。
Galactic Suite plans to transport its travelers to space via Russian rockets from a spaceport to be built on a Caribbean island.
银河酒店公司计划在加勒比海的一个小岛上建造一个发射场，并使用俄国火箭来接送宾客。
More than 80 flights of U.S. space shuttles and Russian rockets will be necessary to complete the International Space Station.
要完成建设国际空间站的工作，需要美国航天飞机和俄罗斯火箭进行超过80次太空飞行。
Space Adventures has already sent seven people to the space station, using Russian rockets.
该公司利用俄罗斯运载火箭，已将七人送入国际空间站。
Chemical rockets have the high thrust necessary to lift rockets into space, overcoming the Earth's gravitational pull.
化学燃料动力火箭可以提供克服地球引力所必须的强大推进力。
NASA's newest class of astronauts signed up knowing there'd be no U.S. rockets to launch them into space, at least not in the immediate future.
NASA的最新宇航员被告知并不会有美国的火箭送他们进入太空，至少短期内是这样的。
NASA's newest class of astronauts signed up knowing there'd be no U.S. rockets to launch them into space, at least not in the immediate future.
NASA的最新宇航员被告知并不会有美国的火箭送他们进入太空，至少短期内是这样的。
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