我们在哪里可以找到足够坚固且足够轻的材料来充当电缆或轨道呢？
Where do we find the material strong enough yet lightweight enough to act as a cable or track?
太空升降机背后的核心理念包括降下一根电缆——也许是由小行星材料制成的，——从对地静止轨道到地球表面。
The central idea behind a Space Elevator involves lowering a cable — perhaps constructed from asteroid material — from geostationary Earth orbit to the surface of the Earth.
最后一步这样实现：用950艘运载火箭运输材料，在地球轨道上建造10艘宇宙飞船，再用2年时间飞往那颗红色行星。
Ten space ships constructed in orbit using 950 ferry flights to supply the building materials would make the 2-year voyage to the Red Planet.
应用推荐