Aspens have long roots that burrow through the soil.

白杨有着钻透土壤的长根茎。

More and more of these glacier-fed rivers are merging together and burrowing through the surface.

越来越多源自冰川的河流汇集并在表层下穿过。

That fold burrowed through until it reached the other side, creating your donut-like through-gut in the process.

那个褶皱一直钻到另一边，在这个过程中创造了你甜甜圈一样的内脏。

But Eunotosaurus seemed to have a lot of adaptations for burrowing through dirt.

但是 Eunotosaurus 似乎对在泥土中挖洞有很多适应性。

And not having legs can offer a lot of advantages if you're a reptile that burrows through the dirt.

如果你是一只在泥土中挖洞的爬行动物，没有腿可以提供很多优势。

That's because the way that snakes move seems to work best for either burrowing through soil, like a worm does, or propelling through water, as eels do.

这是因为蛇的移动方式似乎最适合在土壤中挖洞（如蠕虫）或在水中推进（如鳗鱼）。