Geothermal heat pumps pipe water or antifreeze liquid through this layer of earth to siphon its energy.

地热热泵将管道水或防冻液泵过这层地球以虹吸其能量。

" Soil" , we're talking about the noun, which is the top layer of earth where plants grow.

“土”，我们说的是名词，就是植物生长的地球表层。

Consider the resurgence of " rammed earth" construction, an ancient technique that involves compacting layers of earth into solid walls.

考虑一下“夯土”建筑的复兴，这是一种古老的技术，涉及将土层压实成坚固的墙壁。

Once the landfills are full, they are capped with a layer of earth, but levels of contamination " would breach human health guidelines" .

一旦垃圾填埋场达到满容量，它们会被一层土封盖，但是污染物的水平将会超出人类健康指南的限制。

These dramatic forms were created by erosion over millions of years, as soft sedimentary rock crumbled away, exposing layers of earth that date back to the age when the Great Plains was covered by the sea.

这些戏剧性的形式是由数百万年的侵蚀造成的，随着软沉积岩的崩塌，暴露出可追溯到大平原被大海覆盖的时代的地球层。

And it came from a layer of earth that dated back 420 million years, when the Silurian Period gave way to the Devonian -- a good 20 million years after Tortotubus first appears in the fossil record.

它来自可追溯到 4.2 亿年前的地球层，当时志留纪让位给泥盆纪——距 Tortotubus 首次出现在化石记录中已有 2000 万年。