flying to the moon is an enduring（永恒的，不朽的） dream of mankind. there are many beautiful legends（传说） about the moon. in the 20th century, since brothers wright（怀特兄弟） invented airplane, people developed space technology（空间技术） rapidly. in 1961, gagarin（加加林，苏联宇航员） walked in the space. 8 years later, american astronaut neil armstrong became the first man to walk on the
