What does the Torah mean when it compares the produce from T'rumas Ma'aser has been taken to Tevu'as Goren and Tevu'as Yekev?
Rashi: It is permitting the Levi to eat it as regular Chulin, just as the Yisrael is allowed to eat his produce, 1 once Terumah Gedolah has been taken from it.
Rashi (in Rosh Hashanah, 12b): Grain and wine both fall under the heading of 'Tevu'ah'.
Why is it necessary to teach us this?
Rashi: Because, in Pasuk 24, the Torah referred to it as Terumah, we would otherwise have thought that it remains forbidden to Zarim.