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16. this is a graph which illustrates...
这个图表向我们展示了......
17. this table shows the changing proportion of a & b from...to...
该表格描述了......年到......年间a与b的比例关系。
18. the graph,presented in a pie chart, shows the general trend in...
该图以圆形图形式描述了......总的趋势。
19. this is a column chart showing...
这是个柱型图，描述了......
20. as can be seen from the graph,the two curves show the flutuation of...
如图所示，两条曲线描述了......的波动情况。
