deb http://debian.ustc.edu.cn/ubuntu trusty main universe multiverse restricted deb http://debian.ustc.edu.cn/ubuntu trusty-updates main universe multiverse restricted deb http://debian.ustc.edu.cn/ubuntu trusty-security main universe multiverse restricted # deb http://debian.ustc.edu.cn/ubuntu trusty-proposed main universe multiverse restricted # deb http://debian.ustc.edu.cn/ubuntu trusty-backports main universe multiverse restricted
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原文地址：http://penguintux.blog.51cto.com/3021117/1698672
