乘电梯登高楼、上大厦，大家都习以为常。假如能乘电梯到月球或国际空间站去旅行，那该多好啊！最近，美国航天局提出了建立“太空电梯”的计划。该计划中的“太空电梯”长达35800千米，不是从地面向空中建造，而是从空中往下延伸，好像一条很长很长的悬梯。“太空电梯”的连接 Take the elevator to the tower, on the building, we all used to it. If you can take the elevator to the moon or the International Space Station to travel, then how wonderful! Recently, NASA proposed a plan to establish a “space elevator.” The “space elevator” in the plan, which lasted 35,800 kilometers, was built not from the ground to the air but extended from the air like a long, long staircase. “Space elevator” connection