опущены, чтобы не загромождать график

Опущены, чтобы не загромождать график-- Data points are shown only in a few graphs for illustration, but are otherwise omitted to preserve clarity. Опыт - run, test run, experiment, test (эксперимент); experience, practice (практика); expertise (большой опыт, компетенция)

 Fig. is a plot of the second time derivative of the position for a typical run.

 Between test runs the test chamber was closed and 1-2 hr allowed for the air inside to become quiescent.

 To test this hypothesis we set up a number of experiments.