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第1段

1 .This is Scientific American's 60-Second Space. I'm Lee Billings. Got a minute?

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2 .Space, the final frontier, is also the most expensive one.

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3 .Reaching Earth orbit typically costs between ten- to twenty-thousand-dollars per kilogram.

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4 .That's because rocketry is the only form of transportation where you throw away your vehicle once you've reached your destination.

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5 .But that might change as soon as January of next year, when Space Exploration Technologies, also known as SpaceX, plans to launch a rocket into space, then bring the rocket's first stage back for a precision landing.

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6 .After launching a payload on a resupply mission to the International Space Station, Space X's Falcon 9 first stage will deploy hypersonic stabilizing fins and fire its engines four times, steering itself to an upright touchdown on a robotic barge floating in the Atlantic Ocean.

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7 .Think of a 14-story building moving faster than a kilometer per second.

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8 .And now imagine slowing it down, balancing it on a jet of rocket exhaust and landing it with an accuracy of 10 meters on a target smaller than a football field.

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9 .It won't be easy, company representatives only give the precision landing 50-50 odds.

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10 .But if successful, SpaceX's audacious test could soon lead to cheaper, fully reusable rockets that make the final frontier not quite so financially challenging.

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11 .Thanks for the minute, for Scientific American's 60-Second Space. I'm Lee Billings.

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