Merge pull request #86 from vito-L/master

id translated
Merge pull request #88 from vito-L/master

groups translated
Merge pull request #90 from vito-L/master

env translated
complete the translation of date.1 by Will.Qian
Merge pull request #91 from willqian/master

complete the translation of date.1 by Will.Qian
complete the translation of head.1 by Will.Qian
Merge pull request #92 from willqian/master

complete the translation of head.1 by Will.Qian
complete the translation of hostid.1 by Will.Qian
Merge pull request #93 from willqian/master

complete the translation of hostid.1 by Will.Qian
complete the translation of shuf.1 by Will.Qian
Merge pull request #94 from willqian/master

complete the translation of shuf.1 by Will.Qian
complete the translation of sum.1 by Will.Qian
Merge pull request #95 from willqian/master

complete the translation of sum.1 by Will.Qian