(Mishnah): Terumah is Mevatel Orlah, and Orlah is Mevatel Terumah;

How is this? If a Se'ah of Terumah fell into 100 [Chulin], and afterwards three Kavim (a half-Se'ah) of Orlah or three Kavim of Kil'ai ha'Kerem fell in, this is 'Terumah is Mevatel Orlah, and Orlah is Mevatel Terumah.'

Orlah is Mevatel Kil'ayim, Kil'ayim is Mevatel Orlah, and Orlah is Mevatel Orlah. How is this? If a Se'ah of Orlah fell into 200, and afterwards more than a Se'ah of Orlah or more than a Se'ah of Kil'ai ha'Kerem fell in, this is Orlah is Mevatel Kil'ayim, and Kil'ayim [if it fell first is Mevatel] Orlah, and Orlah [is Mevatel] Orlah.

(Gemara - R. Kuryas): The Terumah [by itself] is not Mevatel Orlah, rather, Terumah joins with Chulin to be Mevatel Orlah. (The Mishnah did not explicitly mention that the Terumah fell into Chulin.)

Question: Granted, Terumah is Mevatel Orlah, for Tahor is Mevatel Tamei. Is Orlah Mevatel Terumah? Is Tamei (i.e. Isur) Mevatel Tahor?! (How does Bitul apply to Heter?!)

Answer: [Does our Mishnah] not [say that Orlah is Mevatel Terumah to permit it] to Zarim?! Perhaps it is [needed to permit Terumah] to Kohanim?!

Support (Seifa): Orlah is Mevatel Kil'ayim, and Kil'ayim is Mevatel Orlah, and Orlah [is Mevatel] Orlah;

Is there any difference there (regarding Orlah) between Zarim and Kohanim?! (Rather, just like there, Bitul permits to Zarim, also in the Reisha. We explained this like MAHARA FULDA.)

(Mishnah): If a Se'ah of Terumah fell into 100.

(R. Lazar): The Mishnah does not say 'into 100', rather, 'into 99.' (If it were 100, it is Batel even if nothing else falls in!)

(Mishnah): If a Se'ah of Orlah fell into 200.

(R. Lazar): The Mishnah does not say 'into 200', rather, 'into 199.' (If it were 200, it is Batel even if nothing else falls in!)