本文以年龄别死亡率几何均数作为年龄别死亡率的一个概括指标，优点是直观简单、易计算、不需要标准人口、不同人口可直接比较，并可反映年龄别死亡率的指数类型。

This paper recommends the use of the geometric mean of the age-specific mortality rates as a summary index of mortality. This index is intuitively simple, easy to calculate, and it ne...

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通过对蠡县农用土地分等信息系统建立的实证研究，利用计算机自动完成分等信息的输入、数据分析、土地等指数计算、等别划分等工作。

Through a case study in Licounty, arable land grading information system can automatically complete information input., data analysis... land grading index calculation and divide land gradation.

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Don't be intimidated. Even though it is apparently exponential, a lot of times you can actually solve it much, much faster.

别怕，即使它,很明显是指数型的，很多时候,你都能更快的解决它。

麻省理工公开课 - 计算机科学及编程导论课程节选