What does Nehemiah 13:30 mean?

Thus cleansed I them from all foreigners, and appointed charges for the priests and for the Levites, every one in his work;

Thus cleansed I them from all strangers, and appointed the wards of the priests and the Levites, every one in his business;

Thus cleansed I them from all foreigners, and appointed charges for the priests and for the Levites, every one in his work;

So I made them clean from all strange people, and had regular watches fixed for the priests and for the Levites, everyone in his work;

And I have cleansed them from every stranger, and appoint charges to priests and to Levites, each in his work,

So I separated from them all strangers, and I appointed the courses of the priests and the Levites, every man in his ministry:

And I purified them from all foreigners, and appointed the charges of the priests and the Levites, every one in his service;