oscillate

v 1 [I, Tn] (cause sth to) move repeatedly and regularly from one position to another and back again （使某物）摆动: A pendulum oscillates. 摆锤能摆动. 2 [I, Ipr] ~ (between sth and sth) (fml fig 文, 比喻) keep moving backwards and forwards between extremes of feeling, behaviour, opinion, etc; waver （感情、 行为、 想法等）波动, 动摇, 犹豫: He oscillates between political extremes. 他的政治观点在两个极端之间摇摆不定. * Manic depressives oscillate between depression and elation. 躁狂抑郁症患者抑郁与躁狂交替发作. Cf 参看 vacillate. 3 [I] (physics 物) (of electrical current, radio waves, etc) change in strength or direction at regular intervals （指电流、 无线电波等）振荡, 振动.

orotund, orphan, orphanage, orris-root, orth(o)-, orthodontic, orthodontics, orthodontist, orthodox, orthodoxy, orthographic (also orthographical), orthographically, orthography, orthopaedic (also orthopedic), orthopaedics (also orthopedics), orthopaedist (also orthopedist), ortolan, oryx, OS, Oscar, oscillation, oscillator, oscillograph, oscilloscope, osier, osmosis, osmotic, osprey, osseous, ossification, ossified, ossify, ossilate, oste(o)-, ostensible, ostensibly, ostentation, ostentatious, ostentatiously, osteo-arthritis,