【课程内容】
1.The world's population is growing.(世界人口在增长)
2.There are now over 7 billion people in the world.（至今为止有超过7百万人口）
3.During the 20 of century（20世纪）, the population grow from 1.65 billion to 6 billion.(what was the population at the end of 20 cuntrury.)
4.It's now growing at a rate of around 1.1 percent per year.
5.That means an increase about 80 million per year.
6.By 2024, the population is expected to be around 8 billion people.
7.The growth rate used to be higher.
8.In the late 1960s. the rate of growth was about 2%.
9.Since then the growth rate has declined .
10.It is estimated(预计) that the growth rate will be less than 1% by 2020.
（It is estimated that the grownth rate should be even less）
11.By the year 2050, the growth rate should be even less.(注意the 的读法)
12.Even with a declining growth rate, the population will continue to grow.
13.But it will grow at a slower rate.
14.In the past 50 years, the world's population has more than doubled.
15.It has doubled from around 3 billion at 1960 to more than 7 billion in 2011.
16.The rate of growth varies by country.
17.The growth rate in India is more than twice that of China.
18.And the grow rate in Nigeria, which is in Africa, is more than twice India's growth rate.
19.Russia on the other hand, has had a negative growth rate in some years.
20.When a country has a negative growth rate, its population is decreasing.
【知识点】
1.此课主要是分数的表达
1%(one percent)
2.年份的读法：
2024 （Two thousand and twenty-four）
2011(（Two thousand and eleven）)
20th century(二十世纪)
21st Century(21世纪)
1960s (nineteen sixtys)
2020.(Two thousand and twenty)
2050(Two thousand and fifty)
1960(nineteen sitxty)
1980' (80年代)
1980s（二十世纪80年代）
1990's 九十年代1990s
【短语&句子】
