[104a - 27 lines; 104b - 15 lines]
1)[line 17]שבעת קבין ומחצה לכורSHIV'AS KABIN U'MECHETZEH L'CHOR- 7 1/2 Kav (of rocky, unplantable land) per every Beis Kor of land. (7 1/2 Kav is 1/24th of a Beis Kor. This proportion is equal to a Rova (1/4) of a Kav per every Se'ah, which is the maximum difference permissible when one sells land and says "more or less." (There are 30 Se'ah in a Beis Kor, and 6 Kav in a Se'ah, or 180 Kav in a Beis Kor.)
2a)[line 19]כופין את המוכר למכורKOFIN ES HA'MOCHER LIMKOR- we force the seller to sell. (a) According to the RASHBAM, this refers to the case in which the land that the buyer received was more than the stipulated amount (and it exceeded the maximum allowable difference of 7 1/2 Kavim per Beis Kor), and the buyer wants to keep the extra land (and pay extra money for it), but the seller also wants to receive the land back and he does not want to receive money for it. In such a case (according to the Gemara's present understanding of the Beraisa), the seller is forced to sell it to the buyer and to accept money for it, even though the seller wants the land itself. This contradicts the Mishnah (103b), which teaches that the seller is entitled to receive whatever he prefers - monetary compensation in place of the land, or the land itself. (b) According to RABEINU GERSHOM, this refers to the case in which the land that the buyer received was less than the stipulated amount, and the buyer insists that he wants to buy extra land to complete the Beis Kor. In such a case (according to the Gemara's present understanding of the Beraisa), the seller must sell the additional land to the buyer. This contradicts the Mishnah (103b), which teaches that in the same case (where the buyer received less land than stipulated), the seller needs only to refund the buyer's money (in the value of the missing land), regardless of what the buyer wants.
b)[line 20]ואת הלוקח ליקחV'ES HA'LOKE'ACH LIKACH- and we force the buyer to buy. According to both the RASHBAM and RABEINU GERSHOM, this refers to the case in which the land that the buyer received was more than the stipulated amount (and it exceeded the maximum allowable difference of 7 1/2 Kavim per Beis Kor), and the buyer wants to give the land back, but the seller does not want the land but rather he wants monetary compensation for it. In such a case (according to the Gemara's present understanding of the Beraisa), the buyer is forced to buy the extra land from the seller. This is the same ruling as the Mishnah (103b).
3)[line 20]דהוה יקירא מעיקרא, וזל השתאD'HAVAH YEKIRA ME'IKARA, V'ZAL HASHTA- it (the land) was expensive originally, and now it is cheap. The Gemara is saying that the case of the Beraisa is the same as the Mishnah (that is, according to the Rashbam, the buyer received more than the stipulated amount of land (and it exceeded the maximum allowable difference of 7 1/2 Kavim per Beis Kor)). The seller is always entitled to choose whether he wants to receive money in return for the extra land he gave or the land itself. The Beraisa is teaching that when the value of the land decreased after he sold it to the buyer, and now the seller wants the buyer to pay for the extra amount of land at the original, more expensive price, "we force the seller to sell" the land at the present, less expensive price.
4)[line 23]כשערK'SHA'AR- according to the rate/price
5)[line 26]ואפילו בבקעה גדולהAFILU B'VIK'AH GEDOLAH- even in a large valley (where there is much more than one Beis Kor of land; even though the proportion of extra land that was given is much less than a Rova of a Kav per Se'ah (1/24th), nevertheless the buyer must return the land to the seller because it is a significant area of land (i.e. larger than 9 Kav))
6)[line 1]ואי איכא מילתא יתירא (דהוי) לתשעת קבין, הדריIY IKA MILSA YESEIRA (D'HAVEI) L'SISH'AS KABIN, HADREI- if there is any additional [land] above 9 Kav, then he must return it (all of the additional land). Even though Rav Nachman maintains that the land does not have to be returned when there is up to 7 1/2 Kav of extra land per Beis Kor, and there are multiple Beis Kors (such that the total amount of extra land exceeds 9 Kav), nevertheless when there is any extra land more than 7 1/2 Kav per Beis Kor, then all of the land must be returned.
7a)[line 6]שדהSADEH- [if the field that the seller originally sold was fit for use as] a field (for growing crops) (the minimum size of a field is 9 Kav)
b)[line 7]ונעשית גנהV'NA'ASIS GINAH- and then it became fit for use as a garden (for growing vegetables; for example, a river increased in size, or a wellspring formed, bringing water to the field, making it fit for use as a garden) (the minimum size of a garden is 1/2 Kav according to the Chachamim, and 1/4 Kav according to Rebbi Akiva)
8a)[line 9]בורBOR- a pit that is dug in impermeable ground and that is not lined with stones
b)[line 9]אמת המיםAMAS HA'MAYIM- an irrigation channel
c)[line 10]דרך הרביםDERECH HA'RABIM- a road used by the public, at least 16 Amos wide (intended mostly for traffic of horses and wagons and the like)
d)[line 10]ריכבא דדיקלאRICHVA D'DIKLA- a row of [valuable,] interwoven palm-trees
9)[line 12]כלפי לייא?!KELAPEI LAYA?!- Towards which direction is it turning? (The opposite would be reasonable!)
10)[line 14]בטל "הן חסר הן יתר", "מדה בחבל"BITEL "HEN CHASER HEN YASER," "MIDAH B'CHEVEL" - the phrase "whether it is a little more, whether it is a little less," cancels the phrase "[an exact amount] measured by the [measuring] rope" (TEFOS LESHON ACHARON / TEFOS LESHON RISHON)
(a)"Tefos Lashon Acharon" means, "The latter statement is the only one that we regard seriously." That is, if a person says two consecutive statements that have contradictory Halachic ramifications, we assume that he decided that the second statement should categorically revoke the first statement. Therefore, the second statement is valid and the first one is ignored.
(b)The term for the dissenting opinion is "Tefos Leshon Rishon," or "The first statement is the only one that we regard seriously." That is, if a person says two consecutive statements that have contradictory Halachic ramifications, yet he expresses no desire to rescind the first of the two, we assume that he decided to add the second statement only after having pronounced the first. Therefore, the first statement remains valid, and the second one is ignored.