首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
The balance of nature is a very elaborate and very delicate system of checks and counterchecks. It is continually being altered
The balance of nature is a very elaborate and very delicate system of checks and counterchecks. It is continually being altered
admin
2019-07-30
54
问题
The balance of nature is a very elaborate and very delicate system of checks and counterchecks. It is continually being altered as climates change, as new organisms evolve, as animals or plants permeate to new areas. But the alterations have in the past, for the most part, been slow, whereas with the arrival of civilized man, their speed has been multiplied manifold: from the evolutionary time-scale, where change is measured by periods of ten or a hundred thousand years, they have been transferred to the human time-scale in which centuries and even decades count.
Everywhere man is altering the balance of nature. He is facilitating the spread of plants and animals into new regions, sometimes deliberately, sometimes unconsciously. He is covering huge areas with new kinds of plants, or with houses, factories, slag-heaps and other products of his civilization. He exterminates some species on a large scale, but favours the multiplication of others. In brief, he has done more in five thousand years to alter the biological aspect of the planet than has nature in five million.
Many of these changes which he has brought about have had unforeseen consequences. Who would have thought that the throwing away of a piece of Canadian waterweed would have caused half the waterways of Britain to be blocked for a decade, or that the provision of pot cacti for lonely settlers’ wives would have led to Eastern Australia being overrun with forests of Prickly Pear? Who would have prophesied that the cutting down of forests on the Adriatic coasts, or in parts of Central Africa, could have reduced the land to a semi desert, with the very soil washed away from the bare rock? Who would have thought that improved communications would have changed history by the spreading of disease-sleeping sickness into East Africa, measles into Oceania, very possibly malaria into ancient Greece?
选项
答案
自然界的平衡是一个非常微妙又异常脆弱的破坏与反破坏的体系。这种平衡随着气候变化,新生物的进化,以及动植物向新领域的蔓延而不停地变化着。但这种变化在以前,或者说很久以前是缓慢的,随着人类文明的到来,变化的速度就急速地提高了:进化速度由以前的以万年甚至十万年为计算单位提高到现在的以百年甚至几十年为单位。 人类正在不断地改变着大自然的平衡。人们有意或无意地使动植物向其他领域扩展变得更加容易。大片的土地被覆盖上了各种各样的新植物,楼房,工厂,一堆堆的矿渣和其他人类文明的产物。人类使一些物种大规模的灭绝,而又倾向于使另一些物种大量地繁衍。总之,人类在五千年内使地球的生物圈发生的变化远远大于大自然自身五百万年里所发生的变化。 人类给自然带来的这些变化当中,许多后果无法预计。有谁会想到随手丢的一根水草会使不列颠一半的水路十年中无法通行,送给那些孤独的当地居民的妻子的一盆仙人掌会使澳大利亚东部遍布“刺儿梨”森林?有谁会预见到在亚得里亚海海岸,或中非的一些地区砍倒一片森林会使整片土地变为半个荒漠,泥土被冲刷走后只剩下裸露的岩石?又有谁会想到交流的增加会使疾病进行传播,使历史改变——瞌睡病传人了东非,麻疹传人了大洋洲,疟疾也可能进入古希腊?
解析
转载请注明原文地址:https://kaotiyun.com/show/XI5a777K
本试题收录于:
翻译硕士(英语翻译基础)题库专业硕士分类
0
翻译硕士(英语翻译基础)
专业硕士
相关试题推荐
秒杀
本地化
中国特色的社会主义
当我们从全球的角度来看环境问题时,首先注意的是环境问题所引起的人们的各种担心。发达国家担心的是大气和水的污染,能源的紧张,城市对农村面积的不断蚕食。发展中国家最担心的是营养不良,人口增长,水源不足,缺少教育和就业机会。
disguisedinflation
GeorgeWashington,wealthyplanterandfoxhuntingsportsman,waswithoutatraceofPuritanism.Hewassocompletelyindifferen
Town-and-gowncommunities
thecampaigntoeducatePartymembersinpreserving/toretaintheirvanguardnature
美国总统奥巴马在上海演讲,在谈到中美关系时引用了中国古话“温故而知新”。今明两天,奥巴马将在北京参观故宫,登上长城,希望充分领略这个东方古国悠久的历史文化。而就在他访华前夕,美国国会众议院于上月底以压倒性多数通过一项决议案,纪念孔子诞辰2560周年,高度赞
成都瀚海企业集团,总部设在成都市高新区创业路49号,物流基地位于成都市高新区科园南二路六号,占地130多亩①。注册资金1000万元人民币。
随机试题
Iunderstandthetwofactorsthatcontributedtomydownfall:______(缺乏职业目标和缺乏自信).
在财产保险合同有效期内,保险标的的危险程度显著增加的,被保险人应当按照合同约定及时通知()。
根据《碾压式土石坝施工技术规范》DL/T5129--2001,筑坝材料施工试验项目包括()。
背景A公司参与远离所在地炼钢厂的机电安装工程总承包的投标,投标前做了如下工作:(1)分析了招标文件工程范围,本工程含机械设备安装、电气及自动化系统安装、钢结构及非标准件制作安装、工业给水排水施工、防腐及保温工程、筑炉工程。并分析了本公司
某公司上年年末支付每股股息2元,预期回报率为15%,未来3年中超常态增长率为20%,随后的增长率为8%,则股票的价值为()。
下列组织结构类型中,由专门从事某项工作的项目小组发展而来的是()。
下列关于股份支付的会计处理中,正确的有()。
甲公司为增值税一般纳税人,于2015年12月5日以一批商品换入乙公司的一项非专利技术,该交换具有商业实质。甲公司换出商品的账面价值为80万元,不含增值税的公允价值为100万元,增值税额为17万元;另收到乙公司补价10万元。甲公司换入非专利技术的原账面价值为
阅读“青藏地区”教学片断,回答问题。教师提出一个问题:“青藏地区”是什么样的?【活动1】在青藏地区示意图上填注以下地理事物(1)填注主要经线、纬线的度数。(2)填注喜马拉雅山脉、昆仑山脉、祁连山脉、横断山脉、塔里木河、金沙江、塔里木盆地。【活动2
现在公务员面临的工作情况复杂多变,需要我们具备理性的判断及处理能力,请你结合自身经历,列举一件你遇到过的危急事情,并说明你是如何处理的。
最新回复
(
0
)