## The firstborn ##

"Lot's first daughter" or "The older daughter"

## the younger ##

"the younger daughter." This can also be translated as "her younger sister."

## drink wine ##

This can be translated as "drink wine until he gets drunk" (UDB) or "get drunk with wine."

## so that we may extend our father's line ##

"so that we may maintain the family line of our father" or "so that we can bear children who will be our father's descendants" (UDB)

## he did not know when she lay down, nor when she arose ##

This can also be translated as  "he did not know anything about it" or "he did not know that she had sexual relations with him."