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旬,南极地区的臭氧层减少了40%——这已达到一个空前的水平。
2。 In modern agriculture; mineral depletion of coal is a major concern。 在现代农业中,煤炭资源的消耗是最令人担忧的。
3。 The black loams of the prairies were tempting to New England farmers working their rock and to southeastern farmers plagued with soil depletion。 大草原提供了诱人的黑色土壤——这对整日与岩石地打交道的新英格兰农民或为土壤贫瘠所困扰的东南部农民来说极具吸引力。
disperse[di'sp?:rs]v。 分散,散开;疏散
例句 1。 In some cases; owls get food from the seeds that are dispersed in the wind。 在一些情况下,猫头鹰把飘散在风中的种子当做食物。
2。 A survey shows that it is difficult to get to know people personally when they are milling about and dispersed in large groups。 一项调查显示,当人们兜兜转转,分散在大群体中的时候,想要了解一个人是很困难的。
3。 The fact that pollinators obtain food from the flowering plants makes the plants have its pollen distributed and seeds dispersed much more efficiently than they would be if they were carried by the wind only。 传粉者从开花植物中获取花粉,这比植物仅依靠风的作用来传播花粉或分散种子的效率更高。
domestication[d??mesti'kei?n]n。 驯养;教化
例句 1。 Many plicated theories attempt to explain the way of early domestication of animals。 很多复杂的理论试图解释早期驯养动物的方法。
2。 The proposed areas of the domestication of African crops lie in a bank in West Africa。 提到的非洲作物驯化的区域位于西非某条河的河畔。
drain[drein]v。(使)流走,流干;渐渐耗尽
例句 1。 Much of the water in a sample of water…saturated sediment will drain from it if the sample is placed in a dry place。 如果将样本放在一个干燥的位置,那么这个渗满水的沉积物样本中大部分的水分都会流失。
2。 It is thought the total volume of water in the saturated sample cannot drain away。 饱和样品的总含水量被认为是不可能耗尽的。
3。 Endogenous rivers often do not reach the sea but drain into inland basins。 内生河流通常不会流入大海,而是会在内陆盆地中逐渐干涸。
同义 flow away(流走)
drainage['dreini?]n。 排水;排水系统,排水装置
例句 Extensive irrigation with poor drainage makes the surface of the soil
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