以下是BEC作文中描述图表时常用的句型，分为几个部分来帮助您更好地组织语言：

1. 开头引入：
- "As is illustrated in the chart/diagram, ..."
- "The chart/diagram shows that ..."
- "The given data in the chart/diagram indicates that ..."

2. 描述趋势和变化：
- "There is a gradual/steep rise/increase in ..."
- "The number/figure remained steady/constant from ... to ..."
- "There was a significant jump/drop in ... between ... and ..."
- "The trend/pattern shows a slight decline/reduction in ..."

3. 对比不同部分或组别：
- "When comparing Group A with Group B, it is noticeable that ..."
- "Group A exceeds/cedes to Group B in terms of ..."
- "There is a marked contrast between ... and ..."

4. 描述具体数据：
- "The percentage of ... accounted for ...% in ..."
- "The figure reached a peak of ... in ..."
- "The data points to a low of ... in ..."

5. 预测未来趋势：
- "Based on the chart, it can be predicted that ..."
- "The trend suggests that there will be a likelihood of ..."
- "It is expected that ... will continue/rise/fall in the future."

6. 结尾总结：
- "In conclusion, the chart/diagram highlights the fact that ..."
- "Overall, the data demonstrates that ..."
- "The chart/diagram clearly shows the trend/contrast between ..."

在写作时，请确保使用这些句型时，要根据自己的图表内容和数据来适当调整。这些句型旨在帮助您更好地表达图表中的信息，但不要生搬硬套，使文章显得自然、流畅。

希望这些句型能够帮助您在BEC作文中更好地描述图表，祝您考试成功！如有其他问题，欢迎继续提问。