Yesterday, at least a few thousand of them - no one could make a precise estimate - were missing.

Administration officials said there were still no precise estimates of the mission's scope or how much it would ultimately cost.

Scientists said they would not be able to give a precise estimate of the object's orbit until it had been tracked longer.

The formula, together with precise estimates of its error, can be derived as follows.

The Navy, which sent the least equipment, reported an unusually precise estimate of $246,796.

If we track them for an hour or so, we'll have a more precise estimate of the impact time.

There are no precise estimates for the cost to the state's program.

For now, however, it is an extra cost, though neither company had a precise estimate.

Auditing is based on testing; precise estimates of the model's components are not possible.

Efforts to imagine what the "dark matter" might be and to get a more precise estimate of its mass have so far been unsuccessful.