No1.【动态图】湛江雅托教育培训中心雅思写作专项教材
湛江雅托教育培训中心雅思写作专项教材
No1.
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 only period 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 N2O which gave rise to the expansion of ozone hole over Antarctica in the last two decades of the 20thcentury.
重点词汇
region n.区域，地方，地区
He said he had sharp pains in the stomach region.
layer n.层，阶层
We stripped several layers of paint off the door.
stable adj.稳定的
After several part-time jobs, he's now got a stable job in a bank.
surpass vt.超越，胜过
His time for the 100 metres surpassed the previous world record by one hundredth of a second.
indicate vt.指出，显示，象征，预示，需要，简要地说明
Antihistamine is indicated for this patient as a treatment for her allergies.
give rise to 引起，使发生
International support has given rise to a new optimism in the company.
实用句型
显示上升的趋势： show an upward trend
请注意范文中的这句话：
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-11in 1989.
在表示数据增加时可以用“show an upward trend”来表达，例如：
The number of divorces showed a slightly upward trend since the late 1990s.
如果数据减少，也可以用“show a downward trend”来表达。
