回报寄托 特开习作修改小门脸儿

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不知道楼主大人还在否，小弟奉上拙作一件，孝敬大人！:loveliness:

Argument 126 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."

Outline:
1.总结作者逻辑思路
2.迁徙不一定是生存的必要条件
3.可能由其他因素导致，比如猎人捕杀、食物减少、天敌增多...
4.总结陈词

字数：453


In the editorial of the journal, the author comes to the conclusion that Arctic deer populations decrease for the reason that the recent global warming trends have influenced the formation of the sea ice, which is crucial for the deer to migrate across the sea to a new habitat more suitable for their lives. The deduction looks reasonable at first glance, however, on a second reflection, there are many aspects of the real causes resulting in the declination of the number of Arctic deer that the author has overlooked or chosen to ignore.

In the first place, the editorial failed to put forward relevant evidences which can persuade us to believe that the migration is essential to the survival of the deer. What if the deer don't need to change their habitats? If so, even if it's not cold enough to form ice on the sea to bear the deer to travel on, they can still survive in their original habitats. What's more, there is also no clear statistical data about the frequency of the deer's migrations. Supposing that the deer stay at a place for at least 8 years, and then the migration cannot have a great effect in the changes in the deer's numbers. The arguer’s argument mentioned above is not based on valid evidence. Therefore, we cannot help but doubting the rationality of the analysis of the author.

In the second place, even though the evidence turns out to support the author's foregoing assumption that the Arctic deer really need to change habitats across the sea every year, there are still many possible factors the arguer failed to take into consideration. The arguer just simply assumes that being unable to cross the frozen sea is the only reason for the going down of the number of the Arctic deer. However, it may well is that many other possible factors have contributed a lot to the declination of the deer’s number. Maybe there are a growing number of hunters joining the ranks of the hunting for the Arctic deer, making it even harder for the deer to survive. There are also possibilities that there is less and less food, for some reasons, for the deer to graze. What's more, it is also very likely that the rapid growth of the large carnivores feeding on the deer, such as wolves, makes it difficult for the deer to save themselves from the destiny of being eaten. Without accounting for and ruling out these possibilities crucial to draw his or her conclusion, the arguer cannot bolster the deduction convincingly.

From what I have analyzed above, I want to give an advice to the arguer: Before arriving at a decision about the reasons for the declination of the Arctic deer's number, you should conduct a meticulous investigation, and then analyze and evaluate all probable factors scrutinizingly and thoroughly.