Who knew what he might learn from prolonged medical observation?

It was a poor substitute for prolonged observation, but he was hungry and he had already exhausted his assigned hour.

Other prolonged observations showing "that patients have real changes of tone" is also thus explained by reciprocal motor neglect.

They are also flat and unyielding to prolonged, concentrated observation.

Nor could he allow approach or even prolonged observation of the system's gas giants that might, perhaps, have become stars themselves.

Design and analysis of randomized clinical trials requiring prolonged observation of each patient.

Terrorism experts said that prolonged observation and eavesdropping should prove to be a useful strategy for American investigators.

Smaller or more distant planets may also accompany these stars, but their detection would require more prolonged observations and may be beyond current technology.

Their action seemed sudden to the outside world, but was really undertaken only after prolonged observation and sorrowful debate.

Rubra didn't seem to object to these prolonged observations.