但是与常规图形不同的是,这幅图的时间跨度比较大,包含了过去、现在和将来。那么在描述的时候如果完全是按照曲线的顺序来进行,肯定会碰到时态表达的问题,比如在2000年到2030年这段时间里的变化趋势到底应该用什么时态来写,而且在描述每条线变化的时候,都会碰到同样的问题,这时就应该考虑多线图是否有其他的解题思路。
这时,出自雅思考官之手的范文可以给我们一些启发。
The graph shows the increase in the ageing population in Japan, Sweden and the USA. It indicates that the percentage of elderly people in all three countries is expected to increase to almost 25% of the respective populations by the year 2040.
In 1940 the proportion of people aged 65 or more stood at only 5% in Japan, approximately 7% in Sweden and 9% in the US. However, while the figures for the Western countries grew to about 15% in around 1990, the figure for Japan dipped to only 2.5% for much of this period, before rising to almost 5% again at the present time.
In spite of some fluctuation in the expected percentages, the proportion of older people will probably continue to increase in the next two decades in the three countries. A more dramatic rise is predicted between 2030 and 2040 in Japan, by which time it is thought that the proportion of elderly people will be similar in the three countries.
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