Between the oven and stove- the least respectable place in the house.

He won't see a sign of blessing- from that work

Anyone who eats meat or drinks wine of Tisha B'av, on him the verse is said: "And those sins are on their bones"- On Tisha B'Av: meaning the meal that separates it (the last meal before the fast).

Pregnant and nursing women- that cannot sleep on the ground

One is able- That it's possible for them [to sleep on the ground].

What's the practical difference?- Since [the Rabbis] admit in a cause where he is able and [Rebbi Yehuda] admits in a case where he isn't able.

Other beds- that are in the house that he doesn't sleep on. Rebbi Yehuda who in the Mishnah obligates overturning the bed also obligates one who is able to overturn the rest of the beds, and the Rabbis hold he must overturn his bed but not other beds. This is related to a Baraita regarding a mourner.

That the last tablets were given on it- On the 17th of Tammuz Moshe descended from the mountain for the first time and broke the tablets. Then, on the 18th, he grounded up the Golden Calf, judged the sinners, and ascended back to the heavens. He stayed there for 80 days: 40 days he stood in prayer as it says: "and I prayed before Hashem 40 days and 40 nights" (Deuteronomy 9:9), and he stood another 40 days like the first time. A calculation from the 17th of Tammuz until Yom Kippur comes out to 80 days: 12 days left from Tammuz (as it's a short month), 30 days in Av, 29 days in Elul equals 71 days. Add 9 days of Tishrei which equals 80 days. Add on the night of Yom Kipper and remove the night of the 17th of Tammuz that shouldn't be calculated as we already calculate it as the time he went up. Now, the explanation is 80 full days and nights and morning of Yom Kippur which is the 10th of Tishrei he went down and established that day as Yom Kippur to inform then that [Hashem] had forgiven and had mercy on the bad thing that he said he would do to his nation; therefore Yom Kippur was established on the 10th of Tishrei. This is what I heard.

That the tribes were permitted to intermarry- As the Torah said, "and every daughter of Israel who inherits land ect." (Numbers 36:9) and it continues "And inheritance shall not pass over from one tribe to another, rather each Israelite shall cling to his land" [If woman with land intermarried then their land would pass over.] And they stood and allowed this thing on the 15th of Av.

This is the thing that Hashem commanded to the daughters of Tzlaphchad etc.- The word "this (zeh)" is a limiting word the limitation being: This thing will only be observed in this generation of the daughters of Tzlaphchad.

To come into the congregation- To marry women. For Israel had sworn not to intermarry with them as it is written in Judges 21.

From us- this word is a limitation as it is written: "No man from us shall give his daughter to Binyamin". They only swore for themselves (ממנו), but on their children they didn't swear.

1 "[the day] on which the deaths ceased in the desert" - As it was taught in a braita, all 40 years that they were in the desert, every Erev Tisha B’av, the proclaimer would go out and say: let each individual go out and dig [his grave]. And every single person would go out and dig for themselves a grave, and sleep in it, in case they would die before they had dug. And the next day, the proclaimer would go out and proclaim: let the living separate themselves from the dead. And every one who had the soul of life would rise and go out [of his grave]. And every year they would do this. And in the 40th year, they did it, and the next morning everyone stood up alive. And when they saw this, they were astonished, and they said, ‘perhaps we made a mistake in calculating the month [and it is not yet Tisha B’Av].’ They returned and slept in their graves each night until the 15th, and since they saw that the moon was full on Tu [B’av] and no one had died among them, they knew that the calculation of the month was in line, and that the 40 years of the decree had been completed, they established that day as a Yom Tov.