托福综合写作精讲范文：治理海星泛滥

今天继续分享TPO75的综合写作范文。

自此，目前TPO50~TPO75所有综合写作老师已经更新完毕哦~

Tpo75是一篇关于海星治理的文章。难度系数中等。听力反驳方法是常见的，顾左右而言他。阅读说有办法，但是听力说会对其他生物产生影响。

阅读文章

听力+笔记

参考范文

The reading passage points out there are three way to curb the spread of invasive Northen Pacific sea stars. However, the lecture challenges  all the three methods.

Firstly, the reading passage proposes using quicklime as a poison to reduce sea star populations. However, the professor from the lecture believes it is not effective because it harms native sea stars that are critical to maintaining their local ecosystems.  After the invasive sea stars are killed by quicklime,  when native sea stars move into the area, they would suffer from the quicklime which can stay active for a long time once introduced and die.

Secondly, the lecture also claims introducing parasites that attack the reproductive system of male Northern Pacific sea star, mentioned in the reading, is not a reliable method because male sea stars infected with parasites can still fertilize the eggs of females, and a single female can produce up to 20 million eggs. It is unlikely that introducing parasites into habitats where Northern Pacific sea stars have invaded will have much impact on their population.

Finally, the reading passage argues that sterilizing the ballast water of ships is likely to prevent the spread of Northern Pacific sea stars. However, the lecture also casts doubt on it either, because sea stars  can attach themselves to objects around them, such as small boats or fishing equipment, besides ballast water. The lecture suggests that the spread of Northern Pacific sea stars is likely to conintue even if ships sterilize their ballast water.