part 2

10 This is a picture of the increasing population of the United States in only one hundred years. One person in the picture represents twenty million (20,000,000) people. This picture is a graph. This graph lets us see relations between times and numbers of people in the one hundred years from 1900 to 2000.

这是一幅美国人口在短短一百年内增长的图画。 图中的一个人代表2000万（2000万）人。 这张图是一个曲线图。这张图表让我们看到从1900年到2000年的100年间时间和人数之间的关系。

11 This map gives a picture of the population in the different states of the United States of America in 2000. The scale of the map is the same as that used for Europe on page 9. If you look at the two you will see that the U.S.A. is not much smaller than all of Europe.

这张地图描绘了2000年美国各州的人口情况。 这张地图的比例尺与第9页欧洲地图的比例尺相同。 如果你看这两个，你会发现美国 并不比整个欧洲小多少。

12 Which are the countries with the most people in them? China, India, the U.S.A and Indonesia all have populations of over two hundred million. Some countries have less room in them than these four, but these have the greatest populations. It is not good for a country if it does not have enough room for all its people. A person who does not have enough room to live in may not be able to keep well.

哪些国家的人口最多？ 中国、印度、美国和印度尼西亚的人口都超过了2亿。 有些国家的空间比这四个国家少，但这些国家的人口最多。 如果一个国家没有足够的空间容纳所有的人，这对它来说是不好的。 一个没有足够的空间居住的人可能无法保持健康。

13 The population of the earth has increased more than the amount of food. There is a great need for more food. More than a billion people on the earth today need more food than they can get. They cannot get enough food to keep them well and strong. The relation between amount of food and size of population has been changing.

地球上人口的增长超过了食物的增长。 人们非常需要更多的食物。 今天，地球上有超过10亿人需要比他们能得到的更多的食物。 他们不能得到足够的食物来保持健康和强壮。 食物数量和人口数量之间的关系一直在发生变化。

14 There were more than twice as many people in the world in the year 1900 as in 1700. There were more than twice as many in 2000 as in 1900. Will the population of the world go on increasing? Look at the curve in this picture. The increase since 2000 makes it look that way. The world population in 2004 was 6,396,000,000. In the last four years the increase has been almost 300,000,000.

1900年世界人口是1700年的两倍多。 2000年的人数是1900年的两倍多。 世界人口会继续增长吗？ 看这张图中的曲线。 自2000年以来的增长使其看起来是这样的。 2004年世界人口为63.96亿。 在过去的四年里，这一数字增长了近3亿。

15 There were over six billion one hundred million (6,100,000,000) people in the world in 2000. Over one billion of them could not get as much food as they needed. Many of them because of this are not healthy. There are some people everywhere who take more food than is good for them, but many more get less than they need. People are asking one another what the world population will be in 2050 if it goes on increasing like this. It will be very great. It will be much greater in some parts of the world than in others. Some people say it will be between nine and ten billion, and some that it may be as much as twenty billion.

在2000年，世界上有超过60亿（61亿）人。 其中超过10亿人无法获得所需的食物。 许多人因此而不健康。 世界各地都有一些人吃得过多，但更多的人吃得比他们需要的少。 人们互相询问，如果世界人口继续这样增长下去，到2050年世界人口会是多少。 这将是非常伟大的。在世界上的一些地方，它将比在其他地方大得多。 有人说会在90亿到100亿之间，也有人说可能高达200亿。