動詞 oscillate:

1. be undecided about something; waver between conflicting positions or courses of action
   同義詞：hover, vibrate, vacillate, oscillate
2. move or swing from side to side regularly
   同義詞：oscillate, vibrate

形容詞 oscillating:

1. having periodic vibrations
   同義詞：oscillatory

1. A movement from and back to a mean position or axis in an oscillating or alternating motion.
   移動從中間位置或軸線向外或向后的振蕩或依次的運動