前言：目的：了解蒙古族居民出生、死亡情况及动态变化、主要死亡原因。

Objective: To know the status of birth, death, mortality changes and death cause among Mongolian.

youdao

前言：目的：了解蒙古族居民出生、死亡情况及动态变化、主要死亡原因。

Objective: To know the status of birth, death, mortality changes and death cause among Mongolian.

youdao