骨头分解，土地侵蚀，气候变化，森林重生，河流改道——而历史，如果没有被摧毁，也会被逐渐掩盖。
Bones disintegrate, the land erodes, the climate changes, forests come and go, rivers change their course — and history, if not destroyed, is steadily concealed.
土地侵蚀确实也是水质的一个主要危害。
并且由于丰富的表层土被冲刷掉，土地侵蚀威胁到农作物产量。
And because it washes away rich topsoil, erosion can threaten crop yields.
对水质而言，土地侵蚀确实是一个主要的危害，堵塞河流和湖泊及倾撒肥料和杀虫剂进入供水系统。
Erosion can do major damage to water quality, silting streams and lakes and dumping fertilizers and pesticides into the water supply.
很多农民采用较好的保护土地的措施，并且爱荷华州广袤而丰饶的表层土的深度足以持续数十年适度的大量土地侵蚀。
Many farmers use good conservation practices, and the state’s rich topsoil in many areas is deep enough to last decades with moderate amounts of erosion.
岸坡侵蚀是土地侵蚀的一个类型。它进一步又可划分为岸坡崩塌、滑坡侵蚀，岸坡塌陷侵蚀，岸坡沟谷侵蚀和岸坡洪水侵蚀。
Bank erosion is a type of land erosion. It can be divided into bank toppling and landslide erosion, bank subsidence erosion, bank gully erosion and bank flood erosion.
沙漠在不断地侵蚀肥沃土地。
如此程度的侵蚀动摇了土地合理管理的基础，并造成了对下游更为贫穷的缅甸、老挝、泰国、柬埔寨以及越南的跨国影响。
Such levels of erosion shake the foundations of sensible land stewardship and exert downstream, transnational consequences on the poorer nations of Myanmar, Laos, Thailand, Cambodia and Vietnam.
在上个世纪，降雨量已经开始下降了，而森林砍伐导致的侵蚀也影响了土地储水的能力。
Rainfall has decreased over the last century, and erosion from deforestation limits the ground’s capacity to store rainwater.
畜群同时造成大范围土地退化，其中20%的牧场因过度放牧、土壤板结和侵蚀而退化。
At the same time herds cause wide-scale land degradation, with about 20 percent of pastures considered as degraded through overgrazing, compaction and erosion.
与此同时，不可持续的土地和森林利用模式有可能侵蚀柬埔寨赖以取得其大部分增长的自然资源基础。
Unsustainable use of land and forests, meanwhile, threatens to deplete Cambodia's natural assets upon which a good portion of growth is based.
农民不断增加租用可耕地面积，这也意味着他们对耕种土地的侵蚀风险并不熟悉，或者从长远打算来看，并不想在保护土地方面投入太多。
Farmers increasingly rent the land they cultivate, which can mean they are less familiar with areas at risk for erosion or are less invested in caring for the land over the long run.
因为水资源的浪费和土壤被侵蚀，土地资源逐渐缩小。
Land resources are dwindling because of water loss and soil erosion.
沿着公路的表面侵蚀率是已报道的东南亚地区退化最为严重的土地最大侵蚀率的两倍。
Surface erosion along the road is about twice as high as the maximum rates reported from the most degraded lands in Southeast Asia.
巴勒斯坦人有理由担心，这些工程会一点点侵蚀他们未来国家的土地。
Palestinians are justifiably worried that these projects nibble away at the land available for their future state.
几乎每寸可以想到的土地上都有教堂，从主流角度来说，他们迅速成长，他们很快就侵蚀了英国的教会统治。
These are churches of almost every imaginable stripe, and they're springing up and, from a mainstream perspective, they're quickly eroding the authority of the church of England.
部分额外土地被土壤侵蚀消耗着。
他们说，由于大面积的气候变化，近几年经常出现的强烈暴风正在加剧侵蚀土地。
It is being exacerbated, they say, by severe storms, which have occurred more often in recent years, possibly because of broader climate shifts.
土壤侵蚀无论在富国还是穷国，都会威胁到土地的生产力。
Soil erosion threatens the productivity of land in both rich and poor countries.
在尼日尔，沙漠每年会侵蚀79万至100万公顷的土地。
In Niger, the desert still eats 195,000 to 250,000 acres (79,000 to 1 million hectares) of land per year.
表层土因为侵蚀而正在失去，可耕种的土地正在变成沙漠，被盐化，被城市化。
Topsoil is being lost to erosion, and arable land is being lost to desert, to salinization, and to urbanization.
表层土因为侵蚀而正在失去，可耕种的土地正在变成沙漠，被盐化，被城市化。
Topsoil is being lost to erosion, and arable land is being lost to desert, to salinization, and to urbanization.
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