`deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse`
`deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse`
`deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse`
`deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse`
`deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse`
`deb-src http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse`
`deb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse`
`deb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse`
`deb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse`
`deb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse`