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
One basic weakness in a conservation system based wholly on economic motives is that most members of the land community have no
One basic weakness in a conservation system based wholly on economic motives is that most members of the land community have no
admin
2011-01-21
136
问题
One basic weakness in a conservation system based wholly on economic motives is that most members of the land community have no economic value. Yet these creatures are members of the biotic community and, if its stability depends on its integrity, they are entitled to continuance.
When one of these noneconomic categories is threatened and, if we happen to love it, we invent excuses to give it economic importance. At the beginning of the century songbirds were supposed to be disappearing. (46)
Scientists jumped to the rescue with some distinctly shaky evidence to the effect that insects would eat us up if birds failed to control them.
The evidence had to be economic in order to be valid.
It is painful to read these roundabout accounts today. We have no land ethic yet, (47)
but we have at least drawn nearer the point of admitting that birds should continue as a matter of intrinsic right, regardless of the presence or absence of economic advantage to us.
A parallel situation exists in respect of predatory mammals and fish-eating birds. (48)
Time was when biologists somewhat overworked the evidence that these creatures preserve the health of game by killing the physically weak, or that they prey only on "worthless" species.
Here again, the evidence had to be economic in order to be valid. It is only in recent years that we hear the more honest argument that predators are members of the community, and that no special interest has the right to exterminate them for the sake of a benefit, real or fancied, to itself.
Some species of trees have been "read out of the party" by economics-minded foresters because they grow too slowly, or have too low a sale value to pay as timber crops. (49)
In Europe, where forestry is ecologically more advanced, the noncommercial tree species are recognized as members of the native forest community, to be preserved as such, within reason.
Moreover, some have been found to have a valuable function in building up soil fertility. The interdependence of the forest and its constituent tree species, ground flora, and fauna is taken for granted.
To sum up; a system of conservation based solely on economic self-interest is hopelessly lopsided. (50)
It tends to ignore, and thus eventually to eliminate, many elements in the land community that lack commercial value, but that are essential to its healthy functioning.
It assumes, falsely, that the economic parts of the biotic clock will function without the uneconomic parts.
选项
答案
曾经有段时间,生物学家或多或少滥用了一种证据,即这些生物通过杀死体弱者来保持种群的健康,或者说它们仅仅捕食没有价值的物种。
解析
本句主语是Time,谓语是was,表语是when引导的名词性从句做表语。表语从句中的主语是biologists,谓语是overworked,宾语是evidence,而evidence后面有两个由that引导的同位语从句分别修饰evidence。本句翻译中的难点是:Time was when...这个句式,需要大家注意的是动词was为过去式,其语义为:曾有这样一段时间,…
转载请注明原文地址:https://kaotiyun.com/show/2qZ4777K
0
考研英语一
相关试题推荐
Intheeyesoftheauthor,Ice-T’sCopKillershouldbecondemnedfor______.TheauthorassertsthatGeraldLevin’sdefenseso
Theauthordrawsasharpcontrastbetweenthehousingmarketandtherestoftheeconomysoastoshow______.Howdotheconsu
Keneally’sbiographyisintendedmainlyto______.ItisgenerallybelievedthatSicklesshotKey,theloverofhiswife______
ThispassageismainlyItcanbeinferredfromthetextthatthesynthesizingDNAtechnologyshouldbeused
Accordingtothepassage,troublesontheroadareprimarilycausedby______Thewords"goodsense"(Para.2)probablymean_____
TheclueliesintheJapanesenamethathasbeenadoptedforthemaroundtheworld:tsunami.(46)Formedfromthecharactersfor
Accordingtothetext,scholarsandstudentsaregreattravelersbecauseThewriterthinksthatacademicworkhasrecentlybeco
Ascientistwhodoesresearchineconomicpsychologyandwhowantstopredictthewayinwhichconsumerswillspendtheirmoney
IntheangrydebateoverhowmuchofIQcomesfromthegenesthatchildreninheritfromparentsandhowmuchcomesfromexperien
Yougetthegoodnewsthatyourgoodfriendsgotmarriedrecently.Youwritetoshow:1.yourheartiestcongratulation;2.recal
随机试题
患儿男,5岁,发热咳嗽7天,肺部听诊仅呼吸音增强。散在干啰音,X线胸片肺纹理增粗哪项辅助检查对诊断最有帮助()
明确会计确认、计量和报告的时间范围的是
降脂药“拜斯亭”的通用名为
关于十二指肠溃疡的治疗,最重要的是
活血祛瘀药的适应证有
跟单员应确认原材料采购量,原材料的采购数量应与对外合同、订单总量相匹配。()
目前,ATA单证册在我国的适用范围仅限于在()中使用和陈列的货物。
所谓标准券是指不分券种,只分(),统一按面值计算持券量的标准化债券回购交易品种。
斑比效应是指受到此效应影响的人,将会极力反对人类杀害被公认为“可爱”的动物,但同时却不会反对杀害那些“不可爱”的动物。这通常被视为一种不正常、不符合道义的心理现象。根据上述定义,下列属于斑比效应的是()。
有三个关系R、S和T如下:则由关系R和S得到关系T的操作是
最新回复
(
0
)