关于臭氧空洞的雅思图表作文模板

　　The two line graphs illustrate the change in the ozone hole size over the Antarctica region and the amount of three gases produced which caused damage to the ozone layer during the same period.

　　The ozone hole was at its smallest size of about 400 thousand square kms in 1980.but 20 years later. it was enlarged by 9 times to 3. 6 million square kms. The onlyperiod when there was a reduction in size was in the early 1990s （from 2 to 1.2 million square kms） .

　　In 1980. about 70 million tonnes of CFC - 11 was produced, which remained stable for 2 years before undergoing a steady decline to below 10 million tonnes in the late 1990s. The production of CFC- 12. on the other hand. showed an upward trend throughout the 20-year period from 25 to 50 million tones. surpassing the production of CFC- 11 in 1989. N2O, however, was not produced until 1990, but its production grew rapidly to about 40 million tonnes in 2000.

　　Overall, the two graphs indicate that it was mainly CFC - 12 and N20 which gave rise to the expansion of ozone hole over Antarctica in the last two decades of the 20th century.

　　region 区域，地方，地区

　　He said he had sharp pains in the stomach region.

　　layer 层，阶层

　　We stripped several layers of paint off the door.

　　stable 稳定的

　　After several part-time jobs.he's now got a stable job in a bank.