The world's population is growing 世界人口正在增长
There are now over 7 billion people in the world 现在世界上有超过70亿人
During the 20th ，the population grew from 1.65 billion to 6 billion 在20世纪，人口增长从16.5亿到60亿
It's now growing at a rate of around 1.1 percent per year 现在正在以每年大约1.1%的速度增长
That means the increase is about 80 million per year 意思是没年增长8千万
By 2024 the population is expected to be around 8 billion people 到2024年人口预期大约80亿
The growth rate used to be higher 过去的增长率更高
In the late 1960s，the rate of growth was about 2% 在60年代后期人口增长率大约2%
Since then the growth rate has declined 从那后增长率已经下降了
It is estimated that the growth rate would be less than 1% by 2020 据估计到2020年这增长率将低于1%
By the year 2050 the growth rate should be even less 到2050年增长率将更少
Even with a declining growth rate，the population will continue to grow 即使增长率在下降，但人口将继续增长
But will grow at a slower rate 但将以较慢的速度增长
In the past 50 years，the world's population has more than doubled在过去的50年里，世界的人口已经超过双倍了
It has doubled from around 3 billion in 1960 to more than 7 billion 从1960年的30亿增长到现在的70亿，增长了一倍
The rate of growth varies by country 增长率因国家而不同
The growth rate in indina is more than twice that of china 印度的增长率是中国的2倍
And the growth rate in Nigeria which is in Africa is more than twice Indina’s growth rate 非洲的尼日利亚增长率是印度的2倍
Russia，on the other hand，has had negative growth rate in some years 在另一方面，俄罗斯在一些年里增长率为负增长
When a country has a negative growth rate，its population is decreasing 当一个国家的增长率是负增长时，他的人口在下降
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