| 例句 |
retardationsnounpl. of retardation a usually gradual decrease in the pace or level of activity of somethingscientists discovered that they could achieve the retardation of light if they shined it through a variety of substances decelerations, downshifts, letups, slowdowns declines, drops, slumpsebbs, remissions, retreats, wanesarrests, checks, halts, stoppagescollapses, crashes, falls, plunges accelerations |