Her remarks today were an 'expansion on' her earlier comments regarding the budget.
This book is an 'expansion' of a lecture series.
the 'expansion' of a lecture series into a book
(..) - It's getting worse, isn't it? - One apology's all you're getting, all right? - Where's Nash? - He hasn't shown. You wanna wait? We were supposed to deliver Saito's expansion plans... ...to Cobol Engineering two hours ago. By now, they know we failed. It's time we disappear. - Where you gonna go? (..)2010 Inception