Now I get freebase-FB2M.txt in the SimpleQuestion dataset like the picture below, how can I translate the subject like www.freebase.com/m/0cz9079
into words that can be read by human beings?
In more detail, how can i get the exact meaning of "www.freebase.com/m/0cz9079"?
The moral equivalent to rdfs:label in Freebase-speak is /type/object/name. It won't give you the "exact meaning" but at least its name.
If you want a more well rounded view of a particular object/topic, you probably want to take a holistic view of its name(s) (in various languages), its types, and its properties.
BTW, I'm pretty familiar with the Freebase data dumps and don't recognize freebase-FB2M.txt so I suspect that was produced by some third party, not the Freebase team.