ubunta update 一直忽略 是怎么回事

忽略:24 http://cn.archive.ubuntu.com/ubuntu zesty/restricted Translation-zh
忽略:25 http://cn.archive.ubuntu.com/ubuntu zesty/restricted Translation-en
忽略:26 http://cn.archive.ubuntu.com/ubuntu zesty/restricted Translation-zh_CN
忽略:27 http://cn.archive.ubuntu.com/ubuntu zesty/restricted all DEP-11 Metadata
忽略:28 http://cn.archive.ubuntu.com/ubuntu zesty/restricted amd64 DEP-11 Metadata
忽略:29 http://cn.archive.ubuntu.com/ubuntu zesty/restricted DEP-11 64x64 Icons
忽略:30 http://cn.archive.ubuntu.com/ubuntu zesty/universe all Packages
忽略:31 http://cn.archive.ubuntu.com/ubuntu zesty/universe amd64 Packages
忽略:32 http://cn.archive.ubuntu.com/ubuntu zesty/universe i386 Packages
忽略:33 http://cn.archive.ubuntu.com/ubuntu zesty/universe Translation-en
忽略:34 http://cn.archive.ubuntu.com/ubuntu zesty/universe Translation-zh_CN
忽略:35 http://cn.archive.ubuntu.com/ubuntu zesty/universe Translation-zh
忽略:36 http://cn.archive.ubuntu.com/ubuntu zesty/universe amd64 DEP-11 Metadata
忽略:37 http://cn.archive.ubuntu.com/ubuntu zesty/universe all DEP-11 Metadata
忽略:38 http://cn.archive.ubuntu.com/ubuntu zesty/universe DEP-11 64x64 Icons
忽略:39 http://cn.archive.ubuntu.com/ubuntu zesty/multiverse amd64 Packages
忽略:40 http://cn.archive.ubuntu.com/ubuntu zesty/multiverse all Packages
忽略:41 http://cn.archive.ubuntu.com/ubuntu zesty/multiverse i386 Packages
忽略:42 http://cn.archive.ubuntu.com/ubuntu zesty/multiverse Translation-en
忽略:43 http://cn.archive.ubuntu.com/ubuntu zesty/multiverse Translation-zh
忽略:44 http://cn.archive.ubuntu.com/ubuntu zesty/multiverse Translation-zh_CN
忽略:45 http://cn.archive.ubuntu.com/ubuntu zesty/multiverse all DEP-11 Metadata
忽略:46 http://cn.archive.ubuntu.com/ubuntu zesty/multiverse amd64 DEP-11 Metadata
忽略:47 http://cn.archive.ubuntu.com/ubuntu zesty/multiverse DEP-11 64x64 Icons
忽略:48 http://cn.archive.ubuntu.com/ubuntu zesty-updates/main all Packages
忽略:49 http://cn.archive.ubuntu.com/ubuntu zesty-updates/main amd64 Packages
忽略:50 http://cn.archive.ubuntu.com/ubuntu zesty-updates/main i386 Packages
忽略:51 http://cn.archive.ubuntu.com/ubuntu zesty-updates/main Translation-zh_CN
忽略:52 http://cn.archive.ubuntu.com/ubuntu zesty-updates/main Translation-en
忽略:53 http://cn.archive.ubuntu.com/ubuntu zesty-updates/main Translation-zh
忽略:54 http://cn.archive.ubuntu.com/ubuntu zesty-updates/main amd64 DEP-11 Metadata
忽略:55 http://cn.archive.ubuntu.com/ubuntu zesty-updates/main all DEP-11 Metadata
忽略:56 http://cn.archive.ubuntu.com/ubuntu zesty-updates/main DEP-11 64x64 Icons
忽略:57 http://cn.archive.ubuntu.com/ubuntu zesty-updates/restricted amd64 Packages
忽略:58 http://cn.archive.ubuntu.com/ubuntu zesty-updates/restricted all Packages
忽略:59 http://cn.archive.ubuntu.com/ubuntu zesty-updates/restricted i386 Packages
忽略:60 http://cn.archive.ubuntu.com/ubuntu zesty-updates/restricted Translation-zh_CN
忽略:61 http://cn.archive.ubuntu.com/ubuntu zesty-updates/restricted Translation-en
忽略:62 http://cn.archive.ubuntu.com/ubuntu zesty-updates/restricted Translation-zh
忽略:63 http://cn.archive.ubuntu.com/ubuntu zesty-updates/restricted amd64 DEP-11 Metadata
忽略:64 http://cn.archive.ubuntu.com/ubuntu zesty-updates/restricted all DEP-11 Metadata
忽略:65 http://cn.archive.ubuntu.com/ubuntu zesty-updates/restricted DEP-11 64x64 Icons
忽略:66 http://cn.archive.ubuntu.com/ubuntu zesty-updates/universe i386 Packages
忽略:67 http://cn.archive.ubuntu.com/ubuntu zesty-updates/universe amd64 Packages
忽略:68 http://cn.archive.ubuntu.com/ubuntu zesty-updates/universe all Packages
忽略:69 http://cn.archive.ubuntu.com/ubuntu zesty-updates/universe Translation-en
忽略:70 http://cn.archive.ubuntu.com/ubuntu zesty-updates/universe Translation-zh
忽略:71 http://cn.archive.ubuntu.com/ubuntu zesty-updates/universe Translation-zh_CN
忽略:72 http://cn.archive.ubuntu.com/ubuntu zesty-updates/universe all DEP-11 Metadata