47.破解生命之谜solve the mysteries of life

46.第一次载人太空飞行

　the first manned space flight

45.长征系列运载火箭　 Long March rocket series

44. 中国航天局 the Chinese Space Agency

43.探索太空 explore space

42.取得突破性进展make many breakthroughs

41.科教举国rejuvenate the nation by relying on science and education

40.提出计划 put forward a plan

39.呈现出科技发展的繁荣景象

enjoy a boom in scientific and technological development

38.充满伟大成就　 be filled with great achievements