oscillate

1. V-I If an object oscillates, it moves repeatedly from one position to another and back again, or keeps getting bigger and smaller. 擺動[正式]

I checked to see if the needle indicating volume was oscillating. 我查看了那根音量指針是否在擺動。

2. oscillationN-VAR

Some oscillation of the fuselage had been noticed on early flights. 在之前的幾次飛行中，就察覺到了機身有些搖晃。

3. V-I If the level or value of something oscillates, it keeps going up and down. (水平或價值)浮動[正式] [no passive]

Oil markets oscillated on the day's reports from Geneva. 石油市場因當(dāng)日來自日內(nèi)瓦的報道而出現(xiàn)了起伏。

...an oscillating signal of microwave frequency. ...一個微波爐頻率的波動信號。

4. oscillationN-VAR

There have always been slight oscillations in world temperature. 全球氣溫一直在輕微地波動。

5. V-I If you oscillate between two moods, attitudes, or types of behaviour, you keep changing from one to the other and back again. (在兩種情緒、態(tài)度或行為類型間)舉棋不定[正式] [no passive]

The president of the republic oscillated between a certain audacity and a prudent realism. 該共和國總統(tǒng)施政時而大膽，時而謹慎務(wù)實。

6. oscillationN-UNCOUNT

...that perpetual oscillation between despair and distracted joy. ...在絕望和心不在焉的快樂間永無休止的徘徊。