AlwaysOn Group and FCI

The following is from SQL 2012 books online. Does it mean One alwaysOn availability group can only have one FCI replica? Thanks.

• The cluster nodes of an FCI can host only one replica for a
  given availability group:  If you add an availability replica on an FCI,
  the WSFC cluster nodes that are possible FCI owners cannot host another replica
  for the same availability group.

  Furthermore, every other replica must be hosted by an instance of SQL Server
  2012 that resides on a different WSFC node in the same WSFC cluster. The only
  exception is that while being migrated to another WSFC cluster, an availability
  group can temporarily straddle two clusters.

Lijun