You can cut or copy an audio region or region segment in the Audio Track Editor and paste the copy at a different time position.
Select the region, then choose Edit > Cut (or press Delete).
Do one of the following:
Option-drag the region.
When you Option-drag an audio region so that it overlaps another region, the overlapped part of the region is cut.
Select the region, then choose Edit > Copy.
Place the playhead at the point where you want to paste the region, then choose Edit > Paste.