Together , the twin , 384 - pound rovers make up a single 820 million us dollar mission to seek out geological evidence to ascertain if mars were ever a wetter planet capable of sustaining life 据悉，美国航空航宇局为了确定火星是否适合生物生存，耗费八亿两千万美元的巨资，发射“机遇号”和“勇气号”登陆火星。
On the other hand , european space agency launched the mars express in june 2003 . its lander is expected to land in december 2003 and drill and core soil samples for analysis . hopefully , it will find out whether life exists on mars 而欧洲太空总署亦于2003年6月发射了火星快车，准备于2003年12月登陆火星，钻取火星土壤以作分析，希望解开火星是否存在生命之谜。
Since 1965 , nasa has launched a number of unmanned space probes to fly to or even land on mars . though these probes revealed that there were no artificial canals on mars , they found signs of recent liquid water on the subsurface of mars 美国太空总署自1965年曾多次发射无人探测船飞往火星，甚至登陆火星，虽然证实了火星上并无人造的运河，却发现即使在近代，火星地表下极可能仍有液态水的存在。
With nasa planning to land on mars 30 years from now , and with the recent discovery of the most " earth - like " planet ever seen outside the solar system , the space agency has begun to ponder some of the thorny practical and ethical questions posed by deep space exploration 太空总署计画30年后登陆火星，同时随著最近在太阳系外发现与地球最类似的行星，该署开始思考，深太空探险可能产生的一些棘手的实际和伦理道德问题。
Reveals our tenacious quest to better understand the universe at the turn of the century . from the international space station that is now being assembled in orbit , to the possible manned mars mission in two decades time , you will be thrilled by the ingenuity and excitement of the latest space exploration activities ，将展望21世纪初，人类为探索宇宙所进行的太空计划，从现今正在兴建的国际太空站，以至酝酿中的人类登陆火星任务，你将见证人类如何殚精竭虑排除万难，为征服太空而作的种种努力。
The first man to walk on the moon noted that scientists must develop better onboard spacecraft technology and stronger protection shields from harmful space radiation before a manned flight to the red planet can be accomplished . " it will certainly be 20 years or more before that happens , " armstrong said during a global leadership forum 据美联社9月6日报道，阿姆斯特朗表示，在完成登陆火星的载人飞行之前，科学家们必须研发出更好的机载太空船技术以及更强的阻挡有害太空辐射的防护装置。
