1 to keep changing from one extreme of feeling or behaviour to another, and back again （感情或行为）波动: Her moods oscillated between joy and depression. 她一会儿高兴，一会儿消沉，情绪不断波动。

2 (technical术语) to keep moving from one position to another and back again 摆动: Watch how the needle oscillates as the current changes. 看着那指针如何随着电流变化而摆动。

3 (technical术语) (used about electric current, radio waves, etc) to change in strength or direction at regular times （电流、无线电波等）振荡 ➔oscillation noun [C,U]