Original sentence: At first, the Center said its work was done in cooperation with Israeli public and academic research groups.On the other hand, researchers said they were frustrated by the inability to see their work mature into practical implementation and use.This may have turned out to be a double-edged sword
Edited sentence: At first, all of the Center’s work was done in cooperation with Israeli public and academic research groups.On the other hand, many researchers were frustrated by the inability to see their work mature into practical implementation and use.This turned out to be a double-edged sword