2010年考研英语翻译原文：

　　One basic weakness in a conservation system based wholly one economic motives is that most members of the land.community have no economic value. Yet these ereatures are members of the biotic community and, if its stability depends on its inteyrity, they are entitled to continuance。

　　When one of these noneconomic categories is threatened and, if we happen to love it, we invert excuses to give it economic importance.at the beginning of century songbirds were supposed to be disappearing. 46. Scientists jumped to the resure with some distimctly shaky evidence to the effect that insects would eat us up of birds failed to control them, the evideuce had to be comic in order to be valid。

　　It is pamful to read these round about accounts today. we have no land ethic yet. 47. But we have at least drawn near 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 panallel situation exists in respect of predatory mamals and fish-eating birds. 48. Time was when biologists somewhat over worded the evidence that these creatures preserve the health of game by killing the physically weak,or that they prey only on “worthless species”。

　　Some species of tree have been read out of the party by economics-minded foresters because they grow too slowly .or have too low a sale vale to pay as imeber crops. 49. In Europe ,where forestry is ecologically more advanced, the non-commercial tree species are recognized as members of native forest community, to be preserved as such , within reason。

　　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 without the uneconomic pats。

　　2010年考研英语翻译参考译文：

　　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。

　　科学家们提出一些明显站不住脚的证据来补救，其大意是：如果鸟类无法控制害虫，那么这些害虫就会吃光我们人类。

　　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 ecnomic advantage to us。

　　但我们至少几乎也承认这样一个事实：不管鸟类是否给我们带来经济上的好处，但鸟类作为生物本能的权利这一问题将继续存在。

　　48. Time was when biologists somewhat over-worded the evidence that these creatures preserve the health of game by killing the physically weak, or that they prey only on "worthless" species。

　　曾几何时，生物学家们有点过度使用这个证据，即这些物种通过杀死体质弱者或者仅捕食那些它们认为无价值的物种来维持食物链的正常运转。

　　49. In europe, where forestry is ecologically more advanced, the non-commercial tree species are recognized as members of the native forest "community to be preserved as such, within reason。