geometrical mean pitch

例句：

1. 1.The geometric mean of the population is calculated to determine the overall health of the community.
   计算人口的几何平均数以确定社区的整体健康状况。
2. 2. The geometric mean of the lengths of the sides of a triangle is used to find the perimeter.
   三角形边长几何平均数用于求得周长。
3. 3.In statistics, the geometric mean is often used to compare the relative sizes of sets of data.
   在统计学中，几何平均数常被用来比较数据集的大小相对性。