Today, Mars is a dusty, cold desert.

今天，火星是一片尘土飞扬、寒冷的沙漠。

The day was an oasis in the cold desert of March and the sidewalk was cheerful with a population of strolling sun-worshippers.

这一天是三月寒冷沙漠中的一片绿洲，人行道上到处都是散步的太阳崇拜者，令人心情愉快。

Thanks to the space probe MAVEN, we now have clues in the mystery of Mars' shift from a warmer, wetter environment to the cold, dry desert it is today.

而正是由于太空探测器MAVEN, 对于神秘火星我们现有的线索包括温暖、湿润的环境到寒冷, 干燥的沙漠。