When he emerges from the darkroom, she's already changing behind a screen.

The most significant part of this new system is that the kernel itself can and will change behind the scenes.

In what ways might the world be changing, behind his back?

I feel like somebody changed all the rules behind my back.

The 1987 game changed the perspective to behind the player's boxer.

But gradually things began to change in football, only decades behind changes in the rest of society.

But that doesn't change the psychological motivation behind the making of this video.

It was a bathing suit hat, and you were supposed to change your clothes behind the fringe.

They changed behind the bushes and then ran down to the lake.