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

它的主要目标是确定火星是否存在过生命。

Its main goal is to determine if life ever existed on Mars.

youdao

最终的目标是将火星岩石和土壤样本带回地球实验室。

The ultimate aim is a mission to return Mars rock and soils to Earth labs.

youdao