The island is lush with greenery again, regrowing after decades of topsoil mining.

经过几十年的表土开采，岛上又新覆盖了郁郁葱葱的植被。

That builds topsoil and prevents flooding.

这会形成表土，防止洪水。

So, you're seeing at the topsoil, you have the water table, the different layers underneath the ground.

大家可以看到表土层，地下水位，还有地下不同的分层。

Then it's important to aerate the topsoil and leave it loosely packed on the surface.

然的是给表土充气并使其松散地堆积在表面上。

It took four and a half billion years to create the topsoil.

创造表土层耗费了四十五亿年之久。

Below the A horizon are layers of basically all the extras from the topsoil.

A 层以下是表土层基本上 所有的附加物。

We endured pelting rainstorms that washed away our topsoil.

们忍受着暴风雨的袭击, 冲走了们的表土。

We've lost a third of all our topsoil, soon we're going to lose all of it.

们已经失去了所有表土的三分之一，很快们将全部失去。

As settlers cleared land to create the great farms of the American Midwest, more and more valuable topsoil eroded into the Mississippi.

随着定居者开垦土地，建造美国中西部的大农场，越来越多宝贵的表土被侵蚀成密西西比河。

So, the landfill changed its routine, keeping the topsoil in place until just before the trash is dumped, greatly reducing methane emissions.

那么，这个垃圾填埋场一改常规，垃圾倾倒之前，不进行表土剥离，这种做法大大减少了甲烷的排放。

The new landowners are not planning to import new topsoil to make their African acquisitions more arable.

新的土地所有者不打算进口新的表土来使他们在非洲收购的土壤更可耕种。

When it gets this dry, plants and grasses are all that keep the topsoil from blowing away.

当它变得如此干燥时，植物和草就可以防止表土被风吹走。

While arid regions may get the same amount of rain, it now comes in torrents, washing away the topsoil.

虽然干旱地区可能会有同样多的雨水，但现在雨水倾盆而下， 冲走了表土。

Wild, erratic, twisting gales that ripped the village to shreds, tearing off the topsoil that had been broken and fertilized.

狂野、无序、盘旋的狂风席卷村庄，将其撕成碎片， 连那已被翻耕施肥的表土也被无情剥离。

Therefore, loss of topsoil from overgrazing, over-cultivation, or bad livestock management in areas neighbouring deserts will contribute to the continuing expansion of those arid regions.

因此，在邻近沙漠的地区，过度放牧、过度耕作或糟糕的牲畜管理导致表土流失，将导致这些干旱地区的持续扩张。

Decades of overgrazing, climate change-induced droughts, and poor farming practices are stripping not only the Sudanian grasslands of their once fertile topsoil but hundreds of other regions like it across the world.

几十年的过度放牧、气候变化引发的干旱和不良的耕作方式，不仅使苏丹草原失去了曾经肥沃的表土，也使世界上其他数百个类似的地区失去了表土。

And Jackson knows that the way that most crops are grown around the world today is stripping the earth of the fertile topsoil we need to feed future generations.

杰克逊知道，当今世界上大多数农作物的种植方式正在剥夺们养活子孙代所需的肥沃表土。

(professor) Good, not only plants, microorganisms, fungi, and later on, animals like worms, all helped build up a layer of topsoil on the land, which, of course, encouraged more plant life.

很好，不仅植物，微生物、真菌，以及来像蚯蚓这样的动物，都帮助在地表形成了一层表土，这当然促进了更多的植物生长。

He got together with a group of scientists, and they bred perennial grain crops which have deep roots that anchor the fertile topsoil of a farm, preventing erosion and protecting future harvests.

他与一群科学家聚在一起，他们培育出多年生的粮食作物， 这些作物的根深蒂固， 可以固定农场肥沃的表土， 防止侵蚀并保护未来的收成。

It's perilous and foolhardy for the average citizen to remain ignorant about global warming, say, or ozone depletion, air pollution, toxic and radioactive waste, acid rain, topsoil erosion, tropical deforestation, exponential population growth.

普通民众若对全球变暖、臭氧层损耗、空气污染、有毒及放射性废物、酸雨、表土流失、热带雨林砍伐以及人口指数级增长等问题一无所知，是极其危险且不明智的。