"It's such a huge challenge," Lindgren said, of a human expedition to Mars.

“这是一次巨大的挑战。”Lindgren评论到人类的火星之旅。

youdao

"It's such a huge challenge," Lindgren said, of a human expedition to Mars.

“这是一次巨大的挑战。”Lindgren评论到人类的火星之旅。

youdao