A signal from the TV tells each side of the glasses when to turn on and off, showing each eye slightly different images that create the sense of depth.

VOA: special.2010.01.26

But it depends on the depth of the radioactive material.

VOA: special.2011.03.29

The amount depends on the depth of the recession.

VOA: special.2009.03.13

Asked what the new treaty means for U.S-Russia cooperation on the Iranian nuclear issue, Secretary Clinton referred to recent in depth consultations.

VOA: standard.2010.03.26