Even more intriguing, the surface was covered in long cracks, dark streaks all over the moon, as well as complex ridges.

更令人诧异的是，它的表面布满了狭长的裂缝、深色条痕以及复杂的隆起。

We do see these dark streaks on some hillsides that we call recurring slope lineae.

我们确实在一些山坡上看到了这些黑色条纹，我们称之为反复出现的坡度线。

Its two halves lay on the ground, showing the tree's pale insides and the darker streak up its middle.

它的两半躺在地上，露出树的苍白内部和中间较暗的条纹。

But there's also other ideas where you actually don't need liquid water to explain the formation of these dark streaks.

但也有其他想法，你实际上不需要液态水来解释这些黑色条纹的形成。