Paul’s intention in verse 9-13 is to show the absolute freedom of God’s choice.

And this is not all may be equivalent in some languages to a mere conjunctive adverb or phrase, such as “moreover,” “therefore,” or “in addition to this.”

Quoted with permission from Newman, Barclay M. and Nida, Eugene A. A Handbook on Paul’s Letter to the Romans. (UBS Handbook Series). New York: UBS, 1973. For this and other handbooks for translators see here .