A pendulum swinging in a vacuum at a constant amplitude free of external disturbances theoretically keeps perfect time.

If their suspensions are isolated from external disturbance the blocks will respond faithfully to the horizontal component of any incident gravitational wave.

His attempts to concentrate are foiled by external disturbances, noisy neighbours and city sounds.

He notes that creodes tend to have steeper sides earlier in development, when external disturbance rarely suffices to alter the developmental trajectory.

These data are invaluable for the scientists to ascertain whether effects seen in their experimental data are due to external disturbances or not.

She had awakened not because of any external disturbance but because of what had happened in that dream.

Organisms should be shielded from external disturbances.

To the eye, M65's disk appears slightly warped, and its relatively recent burst of star formation is also suggestive of some external disturbance.

An ecosystem has a good health if it is capable of self-restoration after suffering external disturbances.

The stages of the ring oscillator are often differential stages, that are more immune to external disturbances.