帮忙翻译一篇英语文章！谢谢

The word conservation has a thrifty (节俭) meaning. To conserve is to save and protect, to leave what we ourselves enjoy in such good condition that others may also share the enjoyment. Our forefathers had no idea that human population would increase faster than the supplies of raw materials; most of them, even until very recently, had the foolish idea that the treasures were “limitless” and “inexhaustible”. Most of the citizens of earlier generations knew little or nothing about the complicated and delicate system that runs all through nature, and which means that, as in a living body, an unhealthy condition of one part will sooner or later be harmful to all the others.
Fifty years ago nature study was not part of the school work; scientific forestry was a new idea; timber was still cheap because it could be brought in any quantity from distant woodlands; soil destruction and river floods were not national problems; nobody had yet studied long-terms climatic cycles in relation to proper land use; even the word “conservation” had nothing of the meaning that it has for us today.
For the sake of ourselves and those who will come after us, we must now set about repairing the mistakes of our forefathers. Conservation should, therefore, be made a part of everyone’s daily life. To know about the water table (水位) in the ground is just as important to us as a knowledge of the basic arithmetic formulas. We need to know why all watersheds (上游源头森林地带集水区) need the protection of plant life and why the running current of streams and rivers must be made to yield their full benefit to the soil before they finally escape to the sea. We need to be taught the duty of planting trees as well as of cutting them. We need to know the importance of big, mature trees, because living space for most of man’s fellow creatures on this planet is figured not only in square measure of surface but also in cubic volume above the earth. In brief, it should be our goal to restore as much of the original beauty of nature as we can.

翻译：
保持这个词有节俭的意思。保持就是要节约与保护，要把我们现在享有的好条件留给其他人来共享。我们的先人并不知道人口的增长会比材料供应更快，他们中的大多数甚至是直到近阶段仍有这个愚蠢的观点：自然财富是“无限制的”并且“取之不尽的”。前几代的大多数人对整个自然运作的复杂而微妙的系统了解甚少甚至一无所知，这也意味着，在生命体中的某个部分的一个不健康条件迟早会对其他的部分造成危害。50年前，自然研究不是学校研究工作的组成部分，科学林业是一种全新的观点，木材仍然很便宜，因为各种质量的木材都能从遥远的林地引入；土壤破坏和洪水并不是全国性的问题，没人研究过长期的气候循环与土地正确使用间的关系，甚至“保持”这个词也没有我们今天赋予它的意思。
为了我们自己及后人的利益，我们必须开始着手纠正我们祖先造成的错误。因此，节省也就必须当成我们每个人日常生活的组成部分。了解地表水位跟掌握一个基础的数学公式对我们同样的重要。我们需要了解为什么我们需要用植物来保护上游源头森林地带集水区，为什么我们必须充分利用那些正在奔流的河流在流入大海前来灌溉土壤。我们必须了解植树与砍树的责任。我们要知道那些成材的大树的重要性，因为对于我们大多数人类的同类动物来说，在这个星球上的生存空间不仅仅是按照地表的平方来计算的，也要计算地表以上的建筑体积。简言之，我们的目标是尽量地将大自然的美保留下来。来自：求助得到的回答

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