I'm not entirely sure what this 问题 is asking, but the first six seasons have aired in their entirety in Australia, with Season 7 coming later in 2012 to Channel 7. As for DVD releases, I think all of the first 6 seasons are released and available in Australia.
Seasons 1-6 are available on DVD/bluray and season 7 episode 6 was resently aired on tv. I'm not sure when episode 7 will air in Australia as it isn't being aired in the US until 2nd April.
