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[Cara. Zhong老师已改] 托福写作——[综合][TPO27] 求老师批改,万分感谢!!!

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发表于 2018-5-16 15:13 |显示全部楼层
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[passage]:
In the passage, the author proposed three possible causes of the little ice age. However, the professor in the lecture refutes these three points and believes that these points are out of date and none of them actually accounts for the Little Ice Age.

For the first reason in the passage, it is said that disruption of ocean currents may have caused the cooling. Nevertheless, the professor presents the fact that the disrupting of ocean currents can only lower the temperature in Europe and North America, but there was actually also a cooling in the temperature in the Southern hemisphere such as the places like New Zealand and Southern Africa during the little ice age. Therefore, this point does not hold water at all.

Second, the author of the passage states that the Little Ice Age could also have been caused by volcanic eruption. In the professor's opinion, admittedly, the dark clouds and gas caused by the volcanic eruption are able to lower the temperature on earth, but if this actually happened, some visual effects, such as the phenomenon of a dramatically colorful sunset or that the color of snow can be turned from white to grey or brown, should have occurred and human could have known them. However, there was no report about this. So, volcanic eruptions were not strong enough to be the cause the Little Ice Age.

As for the third reason in the passage, the author believes that the decrease of human populations may have also contributed to the cooling of the climate, which allowed the forest trees that were used for agriculture to grow again and then, decreased the greenhouse effect. The professor refutes this point by asserting that there was not enough time to make this process work. The human population actually recovered quickly and these forest trees could be cut down again soon. Hence, the time was not long enough to have a long-term global cooling effect.


Once you eliminate all the impossible, whatever remains, no matter how inprobabe, must be the truth.
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发表于 2018-5-22 11:28 |显示全部楼层
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发表于 2018-5-22 11:28 |显示全部楼层
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