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[Omar~Omar老师已改] 托福写作——[综合+独立][tpo54]

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发表于 2018-7-6 12:13 |显示全部楼层
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Question:Summarize the points made in the lecture, being sure to explain how they respond to the specific concerns presented in the reading passage. The salinity in the inland lake in California which names \\\"the Salton Sea\\\" is increasing. And it is potentially dangouse to the fish and plants living in the lake. Therefore, the passage povides three solutions. While the speaker shows a neGATIVE oppion about them.

Initially, the passage mentions that dividing the water and sediments by evaporation can reduce the salt levels of the lake. However, the speaker points out that the passage has ignore that those sediment is also harmful, even toxic, when they are spare in air.

The second solution is to dilute the lake with ocrean--which has a twenty precents lower salinity--though pipelines or canals. Unfortunatlly, according to the speaker, local government do not have enough resourse to build such a large program. In fact, the lake is at least 100 kilometers away from the nearest sea.

The last solution is constructing walls -- the passage claims that divide the lake into several sections by building walls in the  lake can keep most of the lake suitable for fish and plants. Through the salinity would still increase in the smaller sections. Nevertheless, the effitioncy of this solution is also been doubted by the speaker. The speaker states that the wall can not work for a long time since the earthquark occures quite frequenctlly around the lake.


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Omar~Omar  NOTE: THIS ESSAY IS NOW BEING EVALUATED.  发表于 2018-7-7 22:25
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