Presentation
Now，observe the following Ring Chart carefully，and then describe it to your classmates using what you learned.
1.industry pollution工业污染
2.automobile exhaust汽车尾气
3.burning coal燃煤
4.organic matter有机物
5.secondary sulphate二次硫酸盐
6.nitrate硝酸盐
7.dust尘埃
8.biomass incineration生物质焚烧
9.secondary sulphate，nitrate二次无机气溶胶
You can start like this...
The ring chart clearly shows that the automobile exhaust，burning coal，organic matter，secondary sulphate，nitrate and the dust are the main sources of regional air pollution in Beijing.
Useful expressions:
As is clearly shown in the chart...
According to the figures in the chart...
It can be seen from the chart...
There are several factors leading to this change...
The chart shows that...
We can see from the chart...
It is apparent from the chart...
Video Clip
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Translation for the Text
Video 1
Video 2
课文译文
【注释】
〔1〕the Ministry of Environmental Protection环境保护部
〔2〕the Air Pollution Index空气污染指数
〔3〕the National Meteorological Center国家气象中心
〔4〕China Daily中国日报
〔5〕Peking University's School of Public Health北京大学公共卫生学院
〔6〕the National Central Cancer Registry国家中央癌症登记处
〔7〕the Ministry of Health卫生部
〔8〕Beijing Environmental Protection Bureau北京市环境保护局
〔9〕Beijing Meteorological Bureau北京气象局
〔10〕nitrates［'naɪtreɪt］硝酸盐
〔11〕phosphates［'fɒsfeɪt］磷酸盐
〔12〕eutrophication［.ju:trəfɪ'keɪʃ（ə）n］富营养化；超营养作用
〔13〕nitrogen［'naɪtrədʒ（ə）n］［化学］氮，氮气
〔14〕ecosystem［'ɪ:kəusɪstəm］生态系统
〔15〕oxygen［'ɒksɪdʒ（ə）n］［化学］氧气，氧
〔16〕sulfur dioxide［'sʌlfə；daɪ'ɒksaɪd］［化学］二氧化硫
〔17〕food chain［生态］食物链