oscillating
 振盪的
 oscillating
 振盪
 Os·cil·la·ting a. That oscillates; vibrating; swinging.
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 Os·cil·late v. i. [imp. & p. p. Oscillated p. pr. & vb. n. Oscillating ]
 1. To move backward and forward; to vibrate like a pendulum; to swing; to sway.
 2. To vary or fluctuate between fixed limits; to act or move in a fickle or fluctuating manner; to change repeatedly, back and forth.
    The amount of superior families oscillates rather than changes, that is, it fluctuates within fixed limits.   --De Quincey.
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 oscillating
      adj : having periodic vibrations [syn: oscillatory]