China's first lunar probe Chang'e-1 completed its first orbital transfer Thursday afternoon,another key move in its 380,000-km journey to the moon.The orbital transfer began at 5:55 p.m.and succeeded ...
求嫦娥一号的英文发言稿嫦娥一号的英文发言稿,能在2分钟之内说完,词汇尽量简单易懂（初三左右的水平就OK了）