It was impossible to find the precise source of the sound.

I want you to tight-beam this to the precise source of their last transmission.

Later in a news briefing, officials said the precise source of the fire could not be pinpointed.

He searched for the precise source, for the spot where it had kissed her skin.

And yet I cannot locate the precise source of my anger.

From these data they hope to determine the precise source of lightning activity.

The precise source of the plot - was it domestic or foreign?

Yet, so many variables are involved that precise sources may never be identified.

The precise source of this within the Estuary has not yet been established.

Can you tell me the precise source for those two numbers?