盖尔环形山

不仅是在盖尔环形山，也不仅是有限几个地点，而是在不同历史时期遍布火星各处。

Not just sections of Gale Crater and not just a handful of locations , but at different times around the globe .

在盖尔环形山上发现了大量高氯酸盐。这意味着，如果早期火星存在有机物，而且它们没有被持续的宇宙辐射消灭，那么它们现在也早就不存在了，或者用现有的技术很难发现。

Substantial amounts of perchlorate were found in Gale Crater , suggesting that if early Mars had organic chemicals and they survived eons of radiation bombardment , they are long since gone or they will remain very difficult to detect with current techniques .

因此，科学家开始用各种工具包括地质学等地球科学的工具、有机和无机化学、大气探测以及精密摄像机等等去判断盖尔环形山和其他类似地点是否曾经有生命出现并存活。

So scientists have been using a variety of tools from geology and other earth sciences , organic and mineral chemistry , atmospheric measurements and sophisticated cameras to determine whether life could have arisen and survived in Gale Crater and other locations with similar characteristics .

因此，科学家开始用各种工具——包括地质学等地球科学的工具、有机和无机化学、大气探测以及精密摄像机等等——去判断盖尔环形山和其他类似地点是否曾经有生命出现并存活。

So scientists have been using a variety of tools - from geology and other earth sciences , organic and mineral chemistry , atmospheric measurements and sophisticated cameras - to determine whether life could have arisen and survived in Gale Crater and other locations with similar characteristics .