他是对的，如果真正的目标是飞向火星，那么一定要途经月球就根本没有一点道理。

And he is right. If the real goal is to fly to Mars, there is no reason at all to go via the moon.

youdao

在月球建立永久性结构处于目标之列。

Among the objectives would be building permanent structures on the moon.

youdao

美国确立了2020年重新登陆月球的目标，我们终于在长期的等待之后再次追寻到了太空船探险的踪迹。

With the United States setting the goal of returning humans to the Moon by 2020, we are at long last on track for the rebirth of crewed space exploration.

youdao