2. 外语
  3. 目前，估计每年大约有50000物种绝迹。牛津大学的地理学家尼克-密德尔顿博士说道，如果这种情况继续下去，它对所有生物的影响将可能是深远的。“所有物种都以某种方式互相依赖以生存。因此危险就在于，如果你从这个互相联系的非常复杂的网络上除掉一个物种，你很难预料这

目前，估计每年大约有50000物种绝迹。牛津大学的地理学家尼克-密德尔顿博士说道，如果这种情况继续下去，它对所有生物的影响将可能是深远的。“所有物种都以某种方式互相依赖以生存。因此危险就在于，如果你从这个互相联系的非常复杂的网络上除掉一个物种，你很难预料这

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问题     目前，估计每年大约有50000物种绝迹。牛津大学的地理学家尼克-密德尔顿博士说道，如果这种情况继续下去，它对所有生物的影响将可能是深远的。“所有物种都以某种方式互相依赖以生存。因此危险就在于，如果你从这个互相联系的非常复杂的网络上除掉一个物种，你很难预料这对对生态系统造成的连锁影响。所以，如果你失去了一个重要物种，那也许会引起大量其他物种的绝迹。”
    麻烦的是对这问题还没有明显的解决办法。和全球气温上升以及臭氧大大减少这些问题不一样，如果政府进行干预，这两种情况町以通过减少废气的排放得以减弱，而保护生物的多样性却依然是一个十分棘手的问题。
    最新的想法是“可持续管理”，即指人类应该在保证每一物种有足够的个体存活下来以确保该物种得以延续的条件下，才能够利用动、植物种为自己谋利益。
    人们把可持续管理视为一种保护物种使之免于绝迹的实用而又经济的办法。这种办法使当地人们可以为了经济上的原因而失去保护动、植物，而不是依靠在很大程度上难以奏效的反对非法偷猎的规章制度。例如，在津巴布韦就有可持续管理项目来保护大象。外国游客为娱乐而杀这动物要付高额费用。这钱随后再交给发生射猎的地区居民。从理论上讲，由于牵涉到当地居民经济利益，他们会受到激励去保护大象而不是去非法偷猎或允许其他人去偷猎大象。
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答案 Now, 50,000 species or so are estimated to become extinct every year. Dr. Nick, geographer from Oxford University, said, "if things continue like this, the consequential effect on all the species will be far-reaching. "All species depend on each other for survival in a certain way. So the danger is that if one species is eliminated from this correlative and highly complicated network, the chain effect on the ecosystem will be unpredictable. Thus, mass other species’ extinction may be caused by a loss of an important one. There is no obvious way to deal with the problem. This is the headache. Unlike these problems such as rising of global temperature and greatly decrease of ozone, both will be improved by reducing exhaust gas’ emission if government interfere in, while variety protection is still a hard nut to crack. The newest idea is sustainable management, that is, making profits by using of animals and plants is acceptable only under this condition that human beings must ensure there is enough individuals alive to guarantee the continue of this species. The sustainable management is regarded as a practical and economical way to protect species from extinction. People join in tile action of protecting animals and plants from an economic motivation through this way instead of the ineffectual anti illegal hunting law to a large degree. For instance, the sustainable management is used to protect elephants in Zimbabwe. Foreign tourists have to pay a high fee in order to kill these animals for entertainment. And then the money will be given back to the inhabitants who live in the hunting places. Theoretically speaking, since getting involved in the local people’ s economic interests, they will be stimulated to protect elephants rather than hunt illegally or allow others to poach for them.
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