They help decompose organic matter, and their burrows keep soil drained and ventilated.
它们帮助分解有机物，其洞穴还能使土壤保持排水和通风。
There are two ways for plant roots to improve soil capability of anti-erosion. One is that fine root can keep soil by its net-work;
植物根系增加土壤的抗侵蚀能力主要通过两种方式：一是通过根系在土体中交错、穿插，网络固持土壤；
In agricultural ecosystem, they supply nutrients for crops with degraded plant residues and keep soil characteristics which are necessary to plant growth.
在农业生态系统中，土壤微生物通过降解植物残体为植物提供营养，同时维持植物生产所需的土壤性质。
Keep the soil moist. That way, the seedling will flourish.
保持土壤湿润,那样小苗就会茁壮成长。
Burning the forest just once can leave behind enough black carbon to keep the soil fertile for thousands of years.
森林仅仅燃烧一次就能留下足够的黑碳，来保持数千年土壤肥沃。
They built thousands of circular stone windbreaks and gardened inside them, and used broken volcanic rocks to keep the soil moist.
他们建造了成千上万的圆形石质防风林并在其中种植花草，还用破碎的火山岩来保持土壤湿润。
The UT team put special sticks inside the soil to capture the energy and keep it in the lamp's batteries for later use.
UT团队在土壤中放置了特殊的棍子来获取能量，并将其保存在灯的电池中以供以后使用。
They stop the wind from blowing soil away. They also keep the wind from damaging or destroying crops.
防风林可以防止风将土壤吹走，还可以防止风损害或摧毁农作物。
The second most common crop, soybeans, yields a lower return but crop rotation is necessary to keep the soil in shape for bounteous corn yields.
其次最常见的农作物，大豆，回报低，但轮作是必要的用以保证土壤能够拥有宽裕的玉米产量。
Forest canopies serve as natural buffers against wind and rain, and the deep roots of trees help keep the granular soil from shifting.
森林的树冠作为自然缓冲，抵挡着风和雨的侵袭，而树木的深根也防止了水土流失。
And then strong soil is waiting for you, where you can stand steadily without trying to keep your balance.
这里有坚实的土地，无需你摇摇摆摆的尝试保持平衡。
In this paper, the construction project for soft soil foundation of several common construction technology are analyzed, and the hope that helps to keep the foundation stability.
本文对建筑工程中软土地基的几种常见的施工技术进行分析，希望有助于保持地基的稳定性。
Most roots are long and round. They grow underground. They keep plants firmly in the soil and absorb water and food from the soil.
大多书的根是长而圆的，它们长在地下，把植物牢牢植根于土壤中，并从土中汲取水分和养分。
你应该让土保持干燥。
Trees do more than keep the soil in place. They also soak up water and prevent flash floods, and keep rivers clear of sediment that can kill fish.
树木所起的作用不止于保持水土。树木还吸收水份、防止洪水突发，并使河流不至于含有可杀死鱼类的泥沙沉淀。
Lichen fields-blooms of orange and gray over red sand and crusts of blackish gypsum-keep the soil stable and are a critical source of food for invertebrates.
地衣区是指红色沙石和黑色石膏地表之上的橙色及灰色植被区，它能稳固土壤，是无脊椎动物最关键的食物来源。
The soil contains materials to keep the balance of the area.
这些泥土中含有保持该地区自然界平衡的物质。
Trees keep moisture in the ground by holding the soil in place to protect erosion.
树木固定土壤，防止侵蚀，从而保持地里的水分。
It does not require much water, so keep the soil somewhat dry.
不需要太多水，所以要保持土壤一定的干燥性。
Windbreaks stop the wind from blowing soil away. They also keep the wind from destroying or damaging crops. They are very important for growing grains, such as wheat.
防风林阻止了风把土壤吹走，也能保护庄稼免受风的破坏。所以防风林对于生长中的像麦类这样的谷物很重要。
They focus on keep their soil rich and free of disease.
他们关心的是保持土壤肥沃并免收病害。
Soil can absorb water, so it helps keep water from flowing away.
土壤能吸收水分，所以它有助于防止水土流失。
Also keep an eye on the roots, raised soil can mean an unsound root system and a unsafe tree.
同时也要查看树根，隆起的土壤意味着扎根不实，不安全的树。
Pebbles and gravel also insulate the soil to keep surface temperatures low and preserve water.
小石头、砂砾层也可用来做隔绝层，以保持水分，降低土壤的温度。
Never again can we expect the oceans that surround American to keep us safe from attacks on our own soil.
我们再也不能期望美国海域能够保证我们的本土安全不受到威胁。
Haiti's trees and roots used to keep the mountainous island's soil in place.
海地的树木和树根过去使这个多山岛国的土壤稳固。
The trees in the forests can keep rain drops from hitting the soil directly .
森林里的树能防止雨滴直接冲击土壤。
We must take steps to keep the soil in place.
我们必须采取措施保持水土。
The practice have proved that the methods can make the reclaimed soil keep a similar characteristics to that of original cropped soil, and meet the requirements for elevation of reclaimed land.
实践证明，该方法能使复垦土壤有效保持类似原耕作土壤的层次结构特点，并能达到复垦地标高的要求。
The practice have proved that the methods can make the reclaimed soil keep a similar characteristics to that of original cropped soil, and meet the requirements for elevation of reclaimed land.
实践证明，该方法能使复垦土壤有效保持类似原耕作土壤的层次结构特点，并能达到复垦地标高的要求。
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