curve of sectional areas

例句：

1. 1. The sectional area of the bridge is 500 square meters.
   这座桥的部分面积是500平方米。
2. 2.The sectional analysis of the data shows that there are significant differences between the two groups.
   数据分段分析显示两组之间存在显著差异。
3. 3. The team's performance was affected by their sectional strengths and weaknesses.
   团队的表现受到了他们部分实力和弱点的影响。