On two pages - like the pages of a Torah scroll, which are made as columns.

If one wrote one letter and erased one letter - onto the water, and then wrote the next letter and erased it, until [in this way] completing [the text] in its entirety, as it is written "all this ritual" [Numbers 5:30] -- that it all be [together] as one.

For her sake - in a scroll by itself, as it is written, "and he shall carry out with her" [Numbers 5:30] -- for her sake.

Also the erasure - into a cup be for her sake -- that it be evident that the erasure is for her sake.

Administered to her to drink through fiber - which is hollow, the way babies drink.

That has a curse with it - with one of [the oaths] it is written "with the curse of adjuration" [Numbers 5:21]. Later on it will explain what the circumstances are.

I administer an oath to you - with the name [of God], and he pronounces the name.

That you were not defiled - that you are telling the truth that you were not defiled -- that is an oath that does not have a curse with it.

As, if you were defiled, they will come upon you - [that is,] the water [will come upon you] "causing the belly to distend and the thigh to sag" etc. [Numbers 5:22] -- which is the curse.

Rava said: the curse stands by itself etc. - there are an oath and a curse here [separately in Rav's formulation], both regarding the woman. However in the verse it is written "with the curse of adjuration" [Numbers 5:21] -- that the oath have the quality of a curse.

I administer an oath to you that if you were defiled, they will come upon you - so, now we have an oath [which includes] a curse [along with it] -- that he administers an oath which states that the curse will take effect.

There is no oath - [administered] to the woman, but the verse states "and [the priest] shall administer the oath to the woman" [cf. Numbers 5:21].

I administer an oath to you that you were not defiled and that if you were defiled [all these curses] will come upon you - I administer an oath to you that what you said before us is truthful, that you were not defiled; and if you were defiled, the water will come upon you. Then the oath that she was not defiled will apply to the woman, as well as to the curse that will occur.

Mishna. Amen on the curse etc. - therefore she is required to double it.

Neither betrothed nor married - he extends upon her, through the mechanism of the "extension of an oath", [an oath regarding] adultery from the period of betrothal, even though he had not expressed a warning [then]. This, then, is a reference to "extension of an oath" in the Torah.