【辉太郎杀G大队】7/16作业by Applemango

ApplemangoUID: 2661244

150The following is a letter to the author of an environmental magazine.

In this argument, the author claims that the global water and air are polluted with the significant evidence that the number of amphibians worldwide is declining. To support this claim the author points out that during the past 77 years, the number of species of amphibians in Yosemite National Park of California decreased. He also cites other evidence that the reason of the decline is not the introduction of trout as considered before. Careful examination of these supporting evidences, however, reveals that it lends little credible support to the author’s claim.

In this argument, the author fails to convince us with the assumption that the research of Yosemite National Park about the decreasing number of amphibians applies equally to the whole world. Yet this might not be the case, for a variety of possible reasons. Perhaps the endemic environment is not suitable for the living of amphibians which cause the decline of the amphibians; or perhaps, the National Park introduce fewer amphibians and other species with the intention to low down the cost. Without accounting for all other explanations, the author cannot justifiably draw the conclusion that the number of amphibians worldwide is declining to begin with.

Next, even if the decline of amphibians were as significant as the author claims, the argument still fail to convince us that the decline indicates the global air and water pollution. We are in the absence of the specific reason that the pollution is the direct reason responsible for the decreasing amphibians. Perhaps fewer amphibians survive due to a sudden change of food chain. And it is highly possible that some species of the amphibians are delicious and popular among the gourmet. People eat more, and the number of amphibians decreases. Without ruling out all other reasons to prove the direct relationship between the decline of amphibian and pollution, it is unfair to conclude that the global environment deteriorates because the amphibian fell off.


Even assuming that the worsen natural environment is the key factor which cause the decline of amphibian worldwide, the author provides no clear evidence that in the National Park of California, the introduction of trout cannot cause the reduced amphibian. Trout are known to eat amphibian eggs and it is possible that, the number of introduced trout is far more than the amphibians which severely threaten the living of those amphibians, and they eat most of the eggs of the amphibians. For that matter, the trout can possibly be the real reason for the decline.

In sum, the author cannot justify his claim that world water and air are polluted on the basis of the scant evidence provided in the argument. To bolster the suggestion the author must provide better evidence that: (1) the pollution is the deciding importance of the decreasing amphibians; (2) the other possible reasons, apart from trout, to explain the decline of amphibians in Yosemite; (3) the phenomenon of declining amphibians in Yosemite can represent the situation of the whole world.

hdsf2003UID: 2351462

In this argument, the author claims that the global water and air are polluted with the significant evidence that the number of amphibians worldwide is declining. To support this claim the author points out that during the past 77 years, the number of species of amphibians (decreased 放在这里比较好) in Yosemite National Park of California decreased. He also cites other evidence that the reason of the decline is not the introduction of trout as considered before. Careful examination of these supporting evidences, however, reveals that it lends little credible support to the author’s claim.
In this argument,（起始句跟第一段有点重复） the author fails to convince us with the assumption that the research of Yosemite National Park about the decreasing number of amphibians applies equally to the whole world. Yet this might not be the case, for a variety of possible reasons. Perhaps the endemic environment is not suitable for the living of amphibians which cause the decline of the amphibians; or perhaps, the National Park introduce fewer amphibians and other species with the intention to low down the cost. Without accounting for all other explanations, the author cannot justifiably draw the conclusion that the number of amphibians worldwide is declining to begin with.
Next, even if the decline of amphibians were as significant as the author claims, the argument still fail to convince us that the decline indicates the global air and water pollution. We are in the absence of the specific reason that the pollution is the direct reason responsible for the decreasing amphibians. Perhaps fewer amphibians survive due to a sudden change of food chain. And it is highly possible that some species of the amphibians are delicious and popular among the gourmet. People eat more, and the number of amphibians decreases.（这个观点有点意义，哈哈） Without ruling out all other reasons to prove the direct relationship between the decline of amphibian and pollution, it is unfair to conclude that the global environment deteriorates because the amphibians fell off.


Even assuming that the worsen natural environment is the key factor which cause the decline of amphibian worldwide, the author provides no clear evidence that in the National Park of California, the introduction of trout cannot cause the reduced amphibian. Trout are known to eat amphibian eggs and it is possible that, the number of introduced trout is far more than the amphibians which severely threaten the living of those amphibians, and they eat most of the eggs of the amphibians. For that matter, the trout can possibly be the real reason for the decline.
In sum, the author cannot justify his claim that world water and air are polluted on the basis of the scant evidence provided in the argument. To bolster the suggestion the author must provide better evidence that: (1) the pollution is the deciding importance
(factor?)
of the decreasing amphibians; (2) the other possible reasons, apart from trout, to (may) explain the decline of amphibians in Yosemite; (3) the phenomenon of declining amphibians in Yosemite can represent the situation of the whole world.




行文清晰，不过，开头别太有创新，要是考试的时候没有把握好，反倒有负面影响