According to the bar chart / pie chart / line graph displays the changes in the number of____________(图表整体趋势). There was an increase in ____________(图表细节).At the point of ____________, ____________reaches its peak value of ____________(数据或变化). What has caused these changes? There are mainly three reasons. Firstly, ____________ (原因一).Secondly, ____________(原因二). The number　of ____________ increased over the period. ____________ rose by _________ from ________ to ________________. And there were____________. Finally, ____________(最后一个原因).In conclusion / We can safely draw the conclusion that ____________(结论). Therefore, ____________(进一步谈论更多个人想法).