30多年前一些预言家曾指出,在“阿波罗”计划之后,将出现商业空天飞机、永久性空间站以及人们将在地球和月球聚居地之间往返飞行。目前,美国航空航天局正在建造国际空间站,还在验证单级入轨可重复使用的运载器技术。今后10～15年,可能开发出两项关键技术——更先进的核推进技术和月球氧。这两项技术将为未来的更先进、更经济的月球运输系统打下基础。 Some prophets more than 30 years ago have pointed out that following the “Apollo” program, commercial spacecraft, permanent space stations and people will fly back and forth between the Earth and the Moon. NASA is currently building the International Space Station and is still validating single-stage orbital reusable carrier technology. In the next 10 to 15 years, two key technologies may be developed - the more advanced nuclear propulsion technology and lunar oxygen. These two technologies will lay the foundation for a more advanced and economical lunar transport system in the future.