And this is why we are taking our rover to train them to search for life on Mars in these areas, because if there was life on Mars three and a half billion years ago, it had to use the same strategy to actually protect itself.
这就是为什么我们训练火星车 在这些地方探索火星生命， 因为如果三十五亿年前 火星上曾经有生命， 它们必然要用同样的方法来保护自己。