union space的意思|示意

Although the Soviet Union initially led the space race, the first spacecraft to fly by a planet other than Earth was an American one, and the first man on the moon was also an American.

尽管前苏联抢占了太空竞赛的先机，第一艘绕行星而不是地球飞行的太空船来自美国，第一位登月宇航员也是美国人。

Fortunately, a few years later both America and the Soviet Union became interested in using solar power in space, where its advantages became apparent very quickly.

值得庆幸是，几年后，因为太阳能动力在太空的优势十分明显，美国和苏联同时对应用它的兴趣大增。

That is exactly why the U.S. wanted to do it, in order to one-up the Soviet Union, who were perceived as leading the space race at the time.

这正是为什么美国想要这样做的原因——为了领先苏联。 那时人们曾认为苏联处于太空竞争的领先地位。