TOPIC: ARGUMENT45 - The following appeared as an editorial in a wildlife journal.
"Arctic deer live on islands in Canada's arctic region. They search for food by moving over ice from island to island during the course of a year. Their habitat is limited to areas warm enough to sustain the plants on which they feed, and cold enough, at least some of the year, for the ice to cover the sea separating the islands, allowing the deer to travel over it. Unfortunately, according to reports from local hunters, the deer populations are declining. Since these reports coincide with recent global warming trends that have caused the sea ice to melt, we can conclude that the decline in arctic deer populations is the result of deer being unable to follow their age-old migration patterns across the frozen sea."
WORDS: 372 TIME: 00:40:00 DATE: 2008-1-23 17:44:38
In this argument, the author concludes that the number of deer is declining is the result of sea ice melting that deer unable to migrate in their own patterns . While several evidences seem logical as they stand, there do exist some flaws in this argument.
The author draws the conclusion relied on the assumption that it is global warming that caused the sea ice to melt. There is no evidence to support this.
Recent global warming may not so quickly influence there, and even if it does have an impact on sea ice, it does not mean sea ice will melt so immediately to sea water. As a common sense, sea ice in Arctic areas are too thick to melt. Without giving enough evidences to support his or her assumption, the author's conclusion is baseless.
Even if global warming caused sea ice to melt, the author based on the additional assumption that the number of Arctic deer is declining. The author reasons that local hunters report that the populations are decreased. However, the author fails to consider other alternative explanations that lend local hunters to believe the number of deer is declining. Perhaps it is hunters that caused the number to decline for the hunters hunt without limitation that destroy the natural balance. Or it is entirely possible that due to the more and more human begin to cultivate the island, deer move to more severity places in order to avoid to be hunted. Fails to consider these possible explanations, the author cannot draw the conclusion too hastily.
Even if Arctic deer cannot move to other islands through ice, it does not mean they do not have enough food to sustain themselves. Maybe they can move to other islands by methods like climb over several mountains to have plenty of food to sustain. Or maybe food in this island is quantity enough for them to eat, not need to go to other islands. For that matter, the number of deer will not decrease due to not having enough food.
In sum, this argument is not convincing for lacking many substaniate evidences to support that the population of deer is declining and global warming is the cause of sea ice to melt.
至于举例,我觉得你的例子有些多了。有的内容可以不用举例,说理了就好;有的内容举例了可以试着省略一些( Perhaps it is hunters that caused the number to decline for the hunters hunt without limitation that destroy the natural balance. )有的则是针对性明显不强显得勉强,那就不用再说了,或者简略地说上几个可能的点就好,比如官方范文的路况导致车祸的几个经典的词。
别的细节,段落结尾尽量不要也很武断地得出背景类的结论(For that matter, the number of deer will not decrease due to not having enough food.)展示你能够理清作者思路以及考虑到可能存在的漏洞即可。每个段尾的模板套话和整个文章的语言风格显得冲突。