作业帮英语翻译In 1795 the political economist Malthus predicted that i
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英语翻译
In 1795 the political economist Malthus predicted that in time mankind would face starvation,having outgrown the available food supplies.Today,a century and a half later,there are still experts who forecast the same global disaster--unless urgent measures are taken to prevent it.
By the end of the present century there may well be over five thousand million people living on this globe,an increase of over fifty percent on today's figure,In order to keep pace with this increase in mankind the farmers of the world will have to step up their production of food by at least two percent every year.Such a rate of increase has never been maintained in any country by conventional methods of agriculture,despite modern mechanization and the widespread use of fertilizers.There are no large worthwhile reserves of potential farmland remaining,and good fertile (肥沃的) land is continually being changed into industrial use.Moreover,erosion of the soil takes a constant toll (损失).
Intensive research,carried out over many years in all manner of climatic conditions.has produced a revolutionary method of growing crops without using any soil at all.Hydroponics (水栽法),as this technique is called,may well be the answer to all our food worries; already it has accomplished wonders in producing huge crops.Hydroponics was once a complicated and expensive business,now it is well out of the experimental stage.Labor costs are far lower than when normal methods of agriculture are employed.in fact.it is a completely automatic system.There is no hard manual work,no digging or ploughing,and no weeding to speak of.Yields can be far higher than they are in soil.
In 1795 the political economist Malthus predicted that in time mankind would face starvation,having outgrown the available food supplies.Today,a century and a half later,there are still experts who forecast the same global disaster--unless urgent measures are taken to prevent it.
By the end of the present century there may well be over five thousand million people living on this globe,an increase of over fifty percent on today's figure,In order to keep pace with this increase in mankind the farmers of the world will have to step up their production of food by at least two percent every year.Such a rate of increase has never been maintained in any country by conventional methods of agriculture,despite modern mechanization and the widespread use of fertilizers.There are no large worthwhile reserves of potential farmland remaining,and good fertile (肥沃的) land is continually being changed into industrial use.Moreover,erosion of the soil takes a constant toll (损失).
Intensive research,carried out over many years in all manner of climatic conditions.has produced a revolutionary method of growing crops without using any soil at all.Hydroponics (水栽法),as this technique is called,may well be the answer to all our food worries; already it has accomplished wonders in producing huge crops.Hydroponics was once a complicated and expensive business,now it is well out of the experimental stage.Labor costs are far lower than when normal methods of agriculture are employed.in fact.it is a completely automatic system.There is no hard manual work,no digging or ploughing,and no weeding to speak of.Yields can be far higher than they are in soil.
1795年,政治经济学家Malthus预测在未来人类将可能面临饥饿和人口过多带来的粮食短缺问题.一个半世纪后的今天,仍然不乏专家预测这样的全球性灾难-采取相关措施,迫在眉睫.
到本世纪末地球人口将有可能超过50亿,是当今人口数量的1.5倍.为了能够应对人口增长带来的粮食压力,全世界的耕种者必须要以每年2%的增幅增加粮食产量.依靠传统的农业生产方式,在世界任何一个国家都没有保持这样的增长率,尽管有现在机械化和肥料的广泛使用.
现在已经没有大片的可耕种地还留存着,肥沃的土地不断地被开发为工业用地.更糟的是,土地的侵蚀带来了长久的损失.经过多年在不同气候条件下的深入研究,人们已经研制出无土栽培的革命性耕种技术.水栽法很可能将解决人类所有的粮食短缺忧虑,且已经在大量栽培中出现奇迹.
过去曾是复杂高昂的水栽法而今已经完全走出了试验阶段.比起传统的农业耕种法,水栽法将大大减少劳动力.实际上,水栽法是一项完全自动化的系统.没有繁重的体力劳动,不用挖掘,耕种,更不用说除草了,而产量比传统土地栽培法要高出许多.
到本世纪末地球人口将有可能超过50亿,是当今人口数量的1.5倍.为了能够应对人口增长带来的粮食压力,全世界的耕种者必须要以每年2%的增幅增加粮食产量.依靠传统的农业生产方式,在世界任何一个国家都没有保持这样的增长率,尽管有现在机械化和肥料的广泛使用.
现在已经没有大片的可耕种地还留存着,肥沃的土地不断地被开发为工业用地.更糟的是,土地的侵蚀带来了长久的损失.经过多年在不同气候条件下的深入研究,人们已经研制出无土栽培的革命性耕种技术.水栽法很可能将解决人类所有的粮食短缺忧虑,且已经在大量栽培中出现奇迹.
过去曾是复杂高昂的水栽法而今已经完全走出了试验阶段.比起传统的农业耕种法,水栽法将大大减少劳动力.实际上,水栽法是一项完全自动化的系统.没有繁重的体力劳动,不用挖掘,耕种,更不用说除草了,而产量比传统土地栽培法要高出许多.
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