So some crater floors never receive light or heat from the Sun.

一些坑内永远也见不到阳光。

Later that day, some perhaps more sensible scientists collect samples from the crater floor.

当天晚些时候，几个更明智的科学家从坑底收集了样本。

The river system, called a delta, rises more than 40 meters above the crater floor.

这条河系被称为三角洲，高出弧坑底部40多米。

The wind blows this into beautiful dunes, including series of parallel ridges in crater floors, and barchan or horseshoe-shaped dunes.

风会把它们吹成沙丘，包括陨石坑底部的一系列平行沙丘，以及新月形或马蹄形的沙丘。

Beginning its journey on the dark crater floor, Perseverance will likely find a volcanic landscape frozen in time.

从黑暗的火山口底部开始旅程，毅力号很可能会发现时间冻结的火山景观。

As the unexpected years went by, Opportunity continued along the hilly rim of Endeavour until it came to Perseverance Valley, which cuts through towards the crater floor.

随着计划外使用时间的流逝，“机遇号”继续沿着“奋进”陨石坑边缘前进，一直走到“毅力谷”，“毅力谷”直通火山口底部。

Then we transitioned from that crater floor into the sedimentary deposits and now we're here in sandstones, conglomerates, mud stones, the kinds of rocks that are deposited by flowing water.

然后我们从火山口底部过渡到沉积沉积物，现在我们在这里看到了砂岩，砾岩，泥石，这些是由流水沉积的岩石。