How can I copy a series of slides from one Prezi to another without losing the second prezi?

How can I copy a series of slides from one Prezi to another without losing  the second prezi?

Hello Lin,
Do you work online? Open the original Prezi (second prezi), make a copy. Open the Prezi you want the frames in. Make a copy of the selected frames (second Prezi). Go to the Prezi and paste it.

So with to open windows you can copy.

Enjoy, regards,

Eko