Methods A total sampled population of 3308 from 35 selected spots in Eryuan County by random sampling were investigated.
方法采用随机抽样法在全县抽取35个自然村为调查点，每个调查点随机抽取35户居民作为调查对象。
Residents felt the quake strongly after it hit Eryuan County, Dali Bai Autonomous Prefecture at 1:41 p. m. with its epicenter 9 km deep.
下午1点41分大理白族自治州洱源县发生地震，震源深度9公里，当地居民震感强烈。
The environmental problems in Eryuan County include the daily life pollution, the secondary agricultural pollution, pollution from towns and village enterprises, and eco-environment deterioration.
洱源县村镇环境存在生活污染、农业二次污染和乡镇企业污染严重，生态环境恶化等问题。
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