The rmgroup command does not allow you to remove the group until you have moved all users that have the group as their primary group to another group.

以这个组作为主组的所有用户必须把主组改为另一个组，然后rmgroup命令才允许删除这个组。

youdao

Typically and by default, the group owner of a file that you create is your primary group, but you can subsequently change the group owner to any of the groups that you belong to.

在通常情况以及缺省情况下，您所创建的文件的组所有者为您的主要组，但是您可以将组所有者更改为您所属的任何组。

youdao

Sometimes primary group relationships evolve out of secondary group relationships.

有时主要的群体关系从次要的群体关系演变而来。

youdao

In addition to Texas with its large Latino population -- a group she has done well with this primary season -- Clinton is also banking on winning Ohio and its blue-collar voters, another group that has backed her in previous primaries and caucuses.

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