马顿是美国宇航局的一名技师,他接受了一项任务,要尽快研制出一种能软又能硬的绳子。原来,宇航员在太空作业时,常常要离开飞船。这就需要在宇航员的身上系一根绳子,以便与飞船保持联系;作业完毕后,宇航员也要拽动绳子,才能返回船舱。但是,我们知道,太空中的情况不同于地球,那是一个失重的环境。在那里,宇航员要抓住绳子,如同想抓 Marton, a NASA technician, accepted a mission to develop a soft, hard rope as soon as possible. It turned out that astronauts in space operations, often leave the spacecraft. This requires a rope tied to the astronaut in order to keep in touch with the spacecraft; after the operation is completed, astronauts also drag the rope to return to the cabin. However, we know that the situation in space is different from that of the Earth, and that is a weightless environment. There, astronauts want to seize the rope, as if to catch