Dark clouds built up overhead for rain during the night.

We hope to build the thing up during the next three or four weeks.

Tension built up again during the last days of out stay.

The Russians had been building their forces up on the border for several months during the previous negotiations.

He built up the tribe during the next few years.

The main objective of the project was to build up the capacities during 2002-2004.

Del built up the fortune even more during his lifetime.

Regular breaks allow more time for the body to release heat built up during exercise.

In preparation they will build up reserves of brown fat during the late summer.

Hagen steadily built his business up during the early years of sound.