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ARGUMENT150 - The following is a letter to the editor of an environmental magazine.
"The decline in the numbers of amphibians worldwide clearly indicates the global pollution of water and air. Two studies of amphibians in Yosemite National Park in California confirm my conclusion. In 1915 there were seven species of amphibians in the park, and there were abundant numbers of each species. However, in 1992 there were only four species of amphibians observed in the park, and the numbers of each species were drastically reduced. The decline in Yosemite has been blamed on the introduction of trout into the park's waters, which began in 1920 (trout are known to eat amphibian eggs). But the introduction of trout cannot be the real reason for the Yosemite decline because it does not explain the worldwide decline."
字数:390 用时:0:30:00 日期:2008-2-28
In this argument, the author claims that the global pollution of water and air is the reason for the decline in the numbers of amphibians worldwide.【个人觉得这个有点片面“The decline in the numbers of amphibians worldwide clearly indicates the global pollution of water and air." 应该是说两栖动物减少是全球污染的一个反映和结果,就是说把作者的另一层意思,两栖动物减少可以反映全球污染给丢了】 The author cites the results of two studies, and exclude another possible reasons to ensure us of its rationality. However, a close scrutiny of the supporting evidences reveals that this argument suffers from several flaws, which render it unpersuasive.
In the first place, the argument is based on the assumption that the numbers of amphibians are declining In the park. However, the author fails to provide any persuasive evidence. Though the author cites the results of two studies of amphibians in Yosemite National Park in California, the data of the two studies cannot serve to substantiate his/her assumption. The author does not provide us with any information about the process of the survey. So we cannot make it sure that whether the situation observed by the survey conductors can reflect the true situation of the park. It is quite possible that some of the amphibians in the park has changed their habitats, so the observers have not find them in 1922. Or perhaps the two study had used different method, so it is meaningless to compare the result of them. Any of these scenarios, if true, may serves to undermine the assumption.【两个假设注意了细节支持,很好】
In the second place, the argument is based on the assumption that the numbers of amphibians are declining world widely. However, the author fails to provide us with any information to prove it, such as statistic results of worldwide surveys or worldwide phenomenon 【可以用复数phenomena】which can reflect the trend. Even assuming that amphibians are declining in the park, the situation in a park cannot represent the situation worldwide. It is quite possible that the decline only happens in Yosemite National Park, and the numbers of amphibians in other places have note 【not】declined or even increased. If the author cannot exclude this possibility, he/she cannot make us to believe that the numbers of amphibians is declining world widely.
In the third place, by exclude 【excluding】the possibility that the decline of the amphibians is caused by the introduction of trout, the author implies that there is no other possibilities. However, there is no evidence to support this assertion. It is quite possible that though the introduction of amphibians 【trout】is not the reason, the declining of the numbers of amphibians is caused by other reasons, rather than pollution of water and air. For example, perhaps it is the excessive hunting 【细节】that has caused the decline. Or perhaps the rising global temperature 【细节】should be blamed. If the author cannot exclude these and other possibilities, he/she cannot persuasive us that the pollution is the reason.
In sum, the argument suffers from several flaws which render it logically unpersuasive as it stands. To strengthen the argument, further investigation and analysis should are needed. If so, it will be more thorough and adequate.
提纲是:
1. 公园两栖动物减少值得怀疑 2. 全球两栖动物减少值得怀疑 3. 不应该排除其它可能
作者的行文很有章法,每一个论证段落都注意了语言的变化和论证的严密,特别是提出假设细节,而不是泛泛而论。这些是值得学习的额地方。
但是,有几点值得琢磨:
1.各段之间感觉没有联系起来,没有形成一个整体。
2.题目还有一个错误就是,用斑斑的话“从一个典型样本推广到所有个性都是如此”,公园和全球的这层个别和广泛之间的关系似乎你没有顾及。不是说,每个错误都要说到,也不是说论据真实与否不能怀疑,只是个人觉得,论证推理上的逻辑问题比质疑论据本身的真实可靠更符合ETS的希望。而你用了很大力气——两个段落来攻击真实与否,对这个公园和世界范围视为同一的问题置之不理,个人感觉你有一点避重就轻的感觉。
3.从文章看你,是在讨论两栖动物是不是少了,减少的原因是不是环境污染。但是,我认为题目的重点不是分析全球两栖动物为什么减少了,他的写作意图是告诉读者,”同志们,大家注意啦~全球两栖动物减少这一事实,说明全球水和空气被污染了!”感觉这个是他的重点,呵呵,我觉得哈。
这是我的想法和你交流~加油,祝你成功~
[ 本帖最后由 zephyrqq 于 2008-2-28 17:14 编辑 ] |
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