2021年5月15日托福考试综合写作回忆和解析含范文

　　2021年5月15日托福考试综合写作回忆和解析  本文由环球教育北京学校祝寅老师整理点评！这次托福考试写作部分整体难度中等偏简单。其中，综合写作为2017年6月3日的一道真题，生物类，有部分专业词汇，难度中等；独立写作为重复2020年4月21日线下题目，也是今年比较高频重复的题目，谈论大学选专业问题，难度中等。

　　综合写作

　　话题分类生物类

　　考题回忆总论点在Alaska和Iceberg这两个地方发现的orca是不是同一个。

　　阅读部分总观点：两个不同地方发现的orca不是同一个。

　　分论点一：两者颜色不一样

　　分论点二：两地相隔很远；

　　分论点三：两者年龄不一样

　　听力部分分论点一：两者颜色不同是由于algae的生长造成的。Algae附在orca表面时，会让orca看上去颜色深。因为发现orca两地季节不一样，algae生长数量不一样，所以有了orca有了颜色差异，但事实上，两者可能颜色一样，因此是同一只。

　　分论点二：Orca分为两类，一类是mammal-hunting group, 这类orca确实如阅读所说，倾向于呆在一个地方；另一类是fish- hunting group，这类orca可以游很远。阅读中提到的orca属于fish- hunting group, 因此，他们可以游很远，2000 kilometers不是问题。因此，这个orca可能是从Alaska游到了Russia了。

　　分论点三：阅读中提及根据dorsal fin估算orca年龄的方法不准确。当orca到20岁的时候，dorsal fin就停止生长了。因此，这个时候，orca可能是20，也可能是25，30。因此，两地orca可能是同一个。

　　解题思路阅读部分

　　1. 两者颜色不一样

　　2：两地相隔很远；

　　3. ：两者年龄不一样；

　　听力部分

　　1. 两者颜色不同是由于algae的生长造成的。Algae附在orca表面时，会让orca看上去颜色深。因为发现orca两地季节不一样，algae生长数量不一样，所以有了orca有了颜色差异，但事实上，两者可能颜色一样，因此是同一只。

　　2. Orca分为两类，一类是mammal-hunting group, 这类orca确实如阅读所说，倾向于呆在一个地方；另一类是fish- hunting group，这类orca可以游很远。阅读中提到的orca属于fish- hunting group, 因此，他们可以游很远，2000 kilometers不是问题。因此，这个orca可能是从Alaska游到了Russia了。

　　3. 阅读中提及根据dorsal fin估算orca年龄的方法不准确。当orca到20岁的时候，dorsal fin就停止生长了。因此，这个时候，orca可能是20，也可能是25，30。因此，两地orca可能是同一个。

　　参考范文范文:

　　Orcas are typically large black whales. However, some scientists have found a white one in Alaska in 2000 and another one nicknamed Iceberg in Russia in 2010. The author of the reading believes that they are totally different animals. However, the professor in the listening part argues that they are the same one.

　　First, the reading claims that there are slight coloration difference between Alaskan orca and Iceberg one. However, the professors refutes that the color of orcas’ skin could change from season to season because of algae. If algae grow on the orcas, the orcas will appear to be darker. Therefore, the two orcas might be the same one as one of them was found in a different season with more algae on its skin.

　　Second, according to the reading, the places where the two orcas were found were far apart and orcas normally do not travel that far. The professor, however, rebuts the point by stating that orcas live in different groups. One is mammal-hunting group which does not might much, the other one is fish-hunting group which could travel over 2000 kilometers. Orcas mentioned in the reading belongs to the fish-hunting group. Thus, it is not surprising that it can travel from Alaska to Russia.

　　Third, the reading suggests that there was age difference between two orcas. Nevertheless, the professor thinks that estimating the age of the orcas based on their dorsal fin is not accurate because after the orca reaches to 20 years old, its dorsal fin will stop growing. In this case, if an orca is estimated to be 20, it might have been 20, 25 or 30. Therefore, Iceberg orca could have older than what has been estimated, indicating that they are just the same orca.