What does Leviticus 12:4 mean?

And she shall continue in the blood of her purifying three and thirty days; she shall touch no hallowed thing, nor come into the sanctuary, until the days of her purifying be fulfilled.

And she shall then continue in the blood of her purifying three and thirty days; she shall touch no hallowed thing, nor come into the sanctuary, until the days of her purifying be fulfilled.

And she shall continue in the blood of her purifying three and thirty days; she shall touch no hallowed thing, nor come into the sanctuary, until the days of her purifying be fulfilled.

And she will be unclean for thirty-three days till the flow of her blood is stopped; no holy thing may be touched by her, and she may not come into the holy place, till the days for making her clean are ended.

and thirty and three days she doth abide in the blood of her cleansing; against any holy thing she doth not come, and unto the sanctuary she doth not go in, till the fulness of the days of her cleansing.

But she shall remain three and thirty days in the blood of her purification. She shall touch no holy thing: neither shall she enter into the sanctuary, until the days of her purification, be fulfilled.

And she shall continue thirty-three days in the blood of her cleansing; no holy thing shall she touch, nor come into the sanctuary, until the days of her cleansing are fulfilled.