英语语法分析

Resupply, not terrain, limits military operations.

再补给，而不是地形，限制了军事活动。

And second, there's only so much room aboard the resupply missions.

其次，再补给任务的运输空间就只有这么大。

You can resupply every two years, when Earth and Mars are at their nearest proximity.

当地球和火星靠的最近的时候，你可以每两年给基地重新补给一次。