贫困是顽疾，“顽”在成因复杂、难以根除、极易反复。
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。业内人士推荐WPS官方版本下载作为进阶阅读
与其说是技术问题，不如说是一个被长期忽视的基础工程问题。
Watch dramatic rescue of skier buried in deep snowA GoPro camera captures the moment two skiers rescued another skier buried under feet of snow in Lake Tahoe, California.