前段時間為gre考生匯總了gre issue寫作提綱思路和分析，希望對考生在攻破gre issue寫作上有所幫助。接下來的幾天我們將為gre考生整理gre argument部分的提綱內容。希望通過我們的整理和匯總，讓gre考生真正能掌握gre寫作的精髓。

　　題目題材：動物，環境

　　gre argument 207題目：

　　It is known that in recent years, industrial pollution has caused the Earths ozone layer to thin, allowing an increase in the amount of ultraviolet radiation that reaches the Earths surface. At the same time, scientists have discovered, the population of a species of salamander that lays its eggs in mountain lakes has declined. Since ultraviolet radiation is known to be damaging to delicate tissues and since salamander eggs have no protective shells, it must be the case that the increase in ultraviolet radiation has damaged many salamander eggs and prevented them from hatching. This process will no doubt cause population declines in other species, just as it has in the salamander species .

　　提綱：

　　The scientists only studied the population of salamanders at one certain cite, thus we could not assert that the overall salamander population is declining.

　　The author fails to compare the populations of other species of salamander whose eggs are not affected by ultraviolet radiation.

　　The author fails to rule out other possible factors that could result in the decline in the population of the salamander species.

　　We could not hastily generalize that other species will also be affected by the process merely based on the decline in the population of certain salamander species.

　　注：題目中括號里的數字表明這句話體現的是提綱中第幾號缺陷。

　　無論是gre issue還是gre argument，考生都應該養成寫提綱的習慣。這種提綱式的gre寫作練習可以幫助考生鍛煉寫作的邏輯性，而gre寫作高分最重要的得分依據就是作文的邏輯性要強。

　　前段時間為gre考生匯總了gre issue寫作提綱思路和分析，希望對考生在攻破gre issue寫作上有所幫助。接下來的幾天我們將為gre考生整理gre argument部分的提綱內容。希望通過我們的整理和匯總，讓gre考生真正能掌握gre寫作的精髓。

　　題目題材：動物，環境

　　gre argument 207題目：

　　It is known that in recent years, industrial pollution has caused the Earths ozone layer to thin, allowing an increase in the amount of ultraviolet radiation that reaches the Earths surface. At the same time, scientists have discovered, the population of a species of salamander that lays its eggs in mountain lakes has declined. Since ultraviolet radiation is known to be damaging to delicate tissues and since salamander eggs have no protective shells, it must be the case that the increase in ultraviolet radiation has damaged many salamander eggs and prevented them from hatching. This process will no doubt cause population declines in other species, just as it has in the salamander species .

　　提綱：

　　The scientists only studied the population of salamanders at one certain cite, thus we could not assert that the overall salamander population is declining.

　　The author fails to compare the populations of other species of salamander whose eggs are not affected by ultraviolet radiation.

　　The author fails to rule out other possible factors that could result in the decline in the population of the salamander species.

　　We could not hastily generalize that other species will also be affected by the process merely based on the decline in the population of certain salamander species.

　　注：題目中括號里的數字表明這句話體現的是提綱中第幾號缺陷。

　　無論是gre issue還是gre argument，考生都應該養成寫提綱的習慣。這種提綱式的gre寫作練習可以幫助考生鍛煉寫作的邏輯性，而gre寫作高分最重要的得分依據就是作文的邏輯性要強。