如果我们能利用太阳能为这样的电梯提供动力，我们只需花费乘坐火箭或航天飞机旅行费用的一小部分就能进入太空。

If we could power such an elevator with solar energy, we could simply rise up into space for a fraction of the cost of a trip by rocket or shuttle.

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日本一直有这样的计划，并且测试通过卫星和火箭部署的太阳帆，但是目前还没有人试着让帆飞行到任何地方去。

Japan continues to have a program, and test solar sails have been deployed from satellites or rockets, but no one has ever gotten as far as trying to sail them anywhere.

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可以说，航天器的速度是挣脱地球乃至太阳引力的惟一要素，目前只有火箭才能突破宇宙速度。

It can be said that the speed of the spacecraft is free of the Earth and even the sun's gravitational the only factor, only the speed rockets can break through the universe.

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