修改issue121

423165179UID: 2649312

ISSUE121 - "At various times in the geological past, many species have become extinct as a result of natural, rather than human, processes. Thus, there is no justification for society to make extraordinary efforts, especially at a great cost in money and jobs, to save endangered species."
字数：407
用时：01:08:08
日期：2009-7-13 0:19:27

Should human being make extraordinary efforts, especially at a great cost in money and jobs, to save endangered species? The statement raises an issue about the relationship between human being and nature. From the（my?） personal perspective, I conceive it is necessary.

As we know, the biosphere is composed by variety(various) living creatures. It's(It) has a complex organized system. Each species depends on many others for its survival. When the relationship between species breaks down, it will cause a series knockdown destroy(breakages). According to a science research, if a kind of vegetation extinguishs, it will lead to 10 to 30 kinds of other vegetations, (after that)insects or animals which straightly or mediate depend on the vegetation will die out after（去掉）. It shows the close relationship between all kinds of species. Admittedly, human being is one part of the biosphere, we can say, every other creatures has an inseparable influence on human being. If the domino effect switched on, ultimately it will endanger our own survival as a species.

Another reason why I endorsement human being should make extraordinary efforts to save endangered species is human being's developing process accelerate the speed of other creatures extinction. History is replete with evidence to demonstrate this point. A notable case in point is the American buffalo. Millions of his kind of(this) species once lived on the prairie of American. But because of over killing(hunting) by human being, the numbers of the American buffalos sharp(sharply) decline. Till the 18th century 90's, only 500 to 600 American buffalos survived. Then the American government decreed to prevent buffalos from (being) killed. Today the number of buffalos resumes as it’s(was) before. This evidence shows clearly what human being can do. Human being has responsibility for the creatures’ extinction.

On the other hand are two compelling arguments against placing a duty on humans to protect endangered species. First, some people insist that endangered species doom to extinguish some day in the future and what we can do is just postpone it. Because of Darwin's natural selection, only stronger species will survive while weaker ones do not. We human being belong to natural creatures, we just do what we should do, as animals must.

From the analysis made above, I commit to the notion that we need to make some efforts to save endangered species. But extraordinary efforts is unnecessary. In the final analysis, at a point when it becomes critical for own survival as a species to save certain others, then we humans will do so.


大体上写的还是不错的，鼓励一哈哈。。但最后那个on the other hand 一段似乎有点突兀，最后的一段的总结也不是很概括，需要改进。。还有最好再稍微写长一点