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发表于 2010-7-26 22:13:36
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本帖最后由 agnes2010 于 2010-7-29 20:31 编辑
ARGUMENT207 - It is known that in recent years, industrial pollution has caused the Earth's ozone layer to thin, allowing an increase in the amount of ultraviolet radiation that reaches the Earth's surface. At the same time, scientists have discovered, the population of a species of salamander that lays its eggs in mountain lakes has declined. Since ultraviolet radiation is known to be damaging to delicate tissues and since salamander eggs have no protective shells, it must be the case that the increase in ultraviolet radiation has damaged many salamander eggs and prevented them from hatching. This process will no doubt cause population declines in other species, just as it has in the salamander species.
by Agnes
2010-7-26
The arguer concludes that the phenomenon that increasing ultraviolet radiation caused from the thinning of the Earth's ozone layer has caused a species of salamander to decline, and will certainly lead to the same population declines in other species. Further investigation into the author's reasoning will show that this argument contains several flaws, which proves it to be unconvincing.
Firstly, no evidence has been provided to prove that the declining population of the salamander that lays its eggs in mountain lakes alone results from the increasing ultraviolet radiation. The arguer does give reader an explanation that ultraviolet radiation whose damaging power over delicate tissues may ruin salamander eggs without protective shells. However, there might be other alternative explanations for the decline. For example, the weather where female salamanders live is atrocious that violent wind and driving rain prevents them from enduring until the end of childbirth. Or, the increasing of living foods may also influence the physical condition of female salamanders, which may be too weak to give birth to its children. As a result of changeable climate, other alternative explanations should be considered while ultraviolet radiation alone can not fully explain the drop in the population of the species.
Secondly, only because ultraviolet radiation will damage delicate tissues, it does not mean the change of tissues will do harm to the hatching of the eggs, or even kill the eggs. Besides its hazards, ultraviolet radiation still enjoys some advantages.
As is known to all, while causing sunburn to people's body, ultraviolet radiation can also help people's bones to develop. Therefore, there lies great possibility that such radiation can benefit the incubation of eggs. Without any scientific proofs to show the effects of ultraviolet radiation, it is ex parte for the arguer to make such groundless conclusion that the radiation prevents the eggs from hatching.
Thirdly, even if the ultraviolet radiation do damage the salamander eggs with no protective shells, the arguer cannot made a cursory conclusion that such damage also exists in other species. If take a species with a hard shell as an example, they may be less likely to be influenced by ultraviolet radiation. In addition, if the surface is hard and thick enough to protect the inside body, no damage will be made to the eggs.
In sum, the arguer's conclusion is unconvincing as it stands. In order to better support this argument, the arguer should convince the readers that the decline in the population is directly and only caused by ultraviolet radiation with plenty of scientific figures and research results. Then the arguer should give reasons to prove that the disadvantages of the radiation over eggs are all the same. To attest it, abundant researches should be essential.
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自改一
by Agnes
2010-7-28
The arguer concludes that the phenomenon that increasing ultraviolet radiation caused from the thinning of the Earth's ozone layer has caused a species of salamander to decline, and will certainly lead to the same population declines in other species. Further investigation into the author's reasoning will show that this argument contains several flaws, which proves it to be unconvincing.
Firstly, no evidence has been provided to prove that the declining population of the salamander that lays its eggs in mountain lakes alone results from the increasing ultraviolet radiation. The arguer does give reader an explanation that ultraviolet radiation whose damaging power over delicate tissues may ruin salamander eggs without protective shells. However, there might be other alternative explanations for the decline. For example, the weather in where female salamanders live is atrocious that violent wind and driving rain prevents them from enduring until the end of childbirth. Or, the increasing of living foods may also influence the physical condition of female salamanders, which may be too weak to give birth to its children. As a result of changeable climate, other alternative explanations should be considered while ultraviolet radiation alone can not fully explain the drop in the population of the species.
Secondly, only because ultraviolet radiation will damage delicate tissues, it does not mean the change of tissues will do harm to the hatching of the eggs, or even kill the eggs. Besides its hazards, ultraviolet radiation still enjoys some advantages.As is known to all, while causing sunburn to people's body, ultraviolet radiation can also help people's bones to develop. Therefore, there lies great possibility that such radiation can benefit the incubation of eggs. Without any scientific proofs to show the effects of ultraviolet radiation, it is ex parte for the arguer to make such groundless conclusion that the radiation prevents the eggs from hatching.
Thirdly, even if the ultraviolet radiation does damage the salamander eggs with no protective shells, the arguer cannot made a cursory conclusion that such damage also exists in other species. If take a species with a hard shell as an example, they may be less likely to be influenced by ultraviolet radiation. In addition, if the surface is hard and thick enough to protect the inside body, no damage will be made to the eggs.
In sum, the arguer's conclusion is unconvincing as it stands. In order to better support this argument, the arguer should convince the readers that the decline in the population is directly caused by ultraviolet radiation alone with plenty of scientific figures and research results. Furthermore, the proofs to show different kinds of species' eggs enjoy the same reaction are also essential to attest the conclusion.
=====================================
自改二
by Agnes
2010-7-29
The arguer concludes that the phenomenon that increasing ultraviolet radiation caused from the thinning of the Earth's ozone layer has caused a species of salamander to decline, and will certainly lead to the same population declines in other species. Further investigation into the author's reasoning will show that this argument contains several flaws, which proves it to be unconvincing.
Firstly, no evidence has been provided to prove that the declining population of the salamander that lays its eggs in mountain lakes alone results from the increasing ultraviolet radiation. The arguer does give reader an explanation that ultraviolet radiation whose damaging power over delicate tissues may ruin salamander eggs without protective shells. However, there might be other alternative explanations for the decline. For example, the weather in where female salamanders live is atrocious that violent wind and driving rain prevents them from enduring until the end of childbirth. Or, the increasing of living foods may also influence the physical condition of female salamanders, which may be too weak to give birth to its children. As a result of changeable climate, other alternative explanations should be considered while ultraviolet radiation alone can not fully explain the drop in the population of the species.
Secondly, only because ultraviolet radiation will damage delicate tissues, it does not mean the change of tissues will do harm to the hatching of the eggs, or even kill the eggs. Besides its hazards, ultraviolet radiation still enjoys some advantages. As is known to all, while causing sunburn to people's body, ultraviolet radiation can also help people's bones to develop. Therefore, there lies great possibility that such radiation can benefit the incubation of eggs. Without any scientific proofs to show the effects of ultraviolet radiation, it is ex parte for the arguer to make such groundless conclusion that the radiation prevents the eggs from hatching.
Thirdly, even if the ultraviolet radiation does damage the salamander eggs with no protective shells, the arguer cannot made a cursory conclusion that such damage also exists in other species. If take a species with a hard shell as an example, they may be less likely to be influenced by ultraviolet radiation. In addition, if the surface is hard and thick enough to protect the inside body, no damage will be made to the eggs.
In sum, the arguer's conclusion is unconvincing as it stands. In order to better support this argument, the arguer should convince the readers that the decline in the population is directly caused by ultraviolet radiation alone with plenty of scientific figures and research results. Furthermore, the proofs to show different kinds of species' eggs enjoy the same reaction are also essential to attest the conclusion. |
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