当我们回首人类探索宇宙的历程时,不由得会被那气壮山河的豪迈气概所鼓舞。在充满传奇色彩的奋斗过程中,许多事件具有划时代的意义。1957年10月4日,苏联“旅行者一号”人造卫星的首次发射成功地揭开了人类迈向宇宙的篇章,加加林飞向太空标志着载人航天飞行的开始。其后,美国阿波罗11号宇宙飞船的月球旅行使人类真正进入一个空间时代。再往后,航天飞机的升空说明空间技术已经走向 When we look back on the journey of mankind to explore the universe, we can not but be inspired by the heroic spirit of the mighty mountains and rivers. In the course of the legendary struggle, many events have epoch-making significance. On October 4, 1957, the first launch of the Soviet “Sputnik” satellite successfully unveiled the chapter of humankind’s move toward the universe. Gagarin’s space launch marked the beginning of manned space flight. Since then, the lunar trip of the United States Apollo 11 spacecraft has really brought mankind into a space era. Later, the launch of the space shuttle shows that space technology has come