11.as is shown/demonstrated/exhibited in the diagram/graph/chart/table...

　　如图所示...

　　12.according to the chart/figures...

　　根据这些表(数字)...

　　13.as is shown in the table...

　　如表格所示...

　　14.as can be seen from the diagram,great changes have taken place in...

　　从图中可以看出，...发生了巨大变化。

　　15.from the table/chart/diagram/figure,we can see clearly that...or it is clear/apparent from the chart that...

　　从图表我们可以很清楚(明显)看到...

　　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。