summation of geometric progression

例句：

1. 1.The teacher asked the students to sum up their answers in class.
   老师要求学生们在课堂上总结他们的答案。
2. 2. The company reported a total of $50 million in profits for the year.
   该公司报告了该年度总共5亿美元的盈利。
3. 3. The summation of all the data points gives us an accurate picture of the situation.
   所有数据点的汇总给我们提供了对情况准确的画面。