Terumos 1:10 - 2:1

אין תורמים מדבר שנגמרה מלאכתו – from something that was shaped into an even pile.

על דבר שלא נגמרה מלאכתו – that was not shaped into an even pile, as it is written (Numbers 18:27): “As with the new grain from the threshing floor or from the flow from the vat,” that whose preparation is completed with that which is completed and not from that whose preparation has been completed in place of that which is completed and not from what is not completed in place of what is completed.

ואם תרם תרומתו תרומה – and specifically for the rest of the produce, but when one donates for priest’s due from olives in place of olive oil or from grapes in place of wine, that which we said above (Mishnah 4), that his donation of priest’s due is not a valid gift, because there is a loss to the Kohen as we have said.

אין תורמין מטהור על הטמא – as a decree lest he separate the heave offering that is not brought near because they are afraid lest the impure [produce] will come in contact with the pure and defile it. But we require that the person who separates the heave offering separates from that which is brought near.

באמת אמרו – wherever it is taught: "באמת אמרו" /”in fact that they said that,” it is as if it is a usage dating from Moses as delivered from Sinai (i.e., a traditional interpretation of a written law), but not exactly a usage dating from Moses as delivered from Sinai, for in the first chapter of [Tractate] Shabbat [Mishnah 3], we taught: “in fact that they said that the teacher sees [by the light of a lamp] where the children are reading,” and this is from the Rabbis (as opposed to from the Bible).

העגול של דבילה – even though the cakes of pressed figs are glued to each other in the midst of the cake of pressed figs, they are not thought of as attached regarding ritual defilement, and if defilement touched one of the cakes of pressed figs, the other is not ritually defiled.

וכן אגודה של יקרק וכן ערימה – it is necessary [to mention both], for if it (i.e., the Mishnah) had taught [only] the circular cake of pressed figs, I would have said that the cake of pressed figs which is one substance, he separates the heave-offering, [but] the bunch [of greens] which is not one substance, he does not separate the heave-offering. But if it (i.e., the Mishnah) had taught [only] the bunch [of greens], I would have said, the bunch [of greens] where it is all one possession, he separates the heave-offering, [but] a pile is not one possession, which he doesn’t separate the heave-offering, hence, they are all necessary.

רבי אליעזר אומר תורמים – ab initio from that which is ritually pure for that which is ritually defiled, for Rabbi Eliezer did not decree lest he come to separate the heave-offering from that which is not brought near , but the Halakha is not according to Rabbi Eliezer.