So that everyone could hear, they used a loud- hailer .

为了使人人都能听到，他们使用了扩音器。

This article makes a case study at Hailer city, Inner Mongolia Autonomous Region Area Hulunbeier, which based on political participation for the proposition.

本文是以公民政治参与为命题，对内蒙古自治区呼伦贝尔市海拉尔区进行的个案研究，由绪论和三章构成。