These are special chemicals, colorings or tastes that counterfeiters could not easily copy.

VOA: special.2010.03.01

Sometimes he did not even keep a copy of his book.

VOA: special.2010.01.10

He did not own a copy of his flying car.

VOA: special.2009.01.14

"To me,to adapt a book is not a question of producing a carbon copy of the book,"

VOA: standard.2010.01.08