n.宇宙航行学
Yuti Gagarin,a Russian cosmonaut,did it. 俄罗斯宇航员尤利-加加林.
A blond, square-jawed cosmonaut is flanked by children and doves. 另一个画面描写一位金发，方颚的宇航员两侧围着儿童和鸽子。
A cosmonaut could not move suddenly into the Apollo. 所以，苏联宇航员不能突然进入“阿波罗”号。
Yuri Gagarin,the first Soviet cosmonaut,was traveling into the unknown. 尤里·加加林，苏联的第一位宇航员，进入过一个完全陌生的世界。
Yuri Gagarin, the first Soviet cosmonaut, was traveling into the unknown. 尤里·加加林，苏联的第一位宇航员，进入过一个完全陌生的世界。
