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发音：[ˈɑsɪˌleɪt]
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例句：
- To oscillate is to swing backward and forward like a pendulum, or to move or travel back and forth between two points.
- The old man oscillates between accepting the new position and retirement.
- Mr. Kenny says he oscillates between elation and despair over the progress of the past few decades.
- If the mass is displaced from its rest position and released, it will oscillate up and down.
- Countries across the region have over the past few years oscillated between left-wing and conservative governments, often with radically different economic and social policies.
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解释：
- Oscillate这个单词为动词，其表示“to swing backward and forward like a pendulum“这一含义，即“前后摆动/震荡/摇摆”，与swing/sway/fluctuate等单词为近义词。
- 实际使用时，oscillate这个单词可以用来表示某一物理实体来回摆动/摇摆，例如风扇或者钟摆等物体。具体使用场景如下：The boy stands over there watching how the needle on the dial oscillates.（男孩站在那边，看着表盘上的指针如何摆动。）/The oscillating fan on the wall made the papers on the employee bulletin board flutter.（墙上的摆动风扇使员工公告板上的纸张颤动。）
- 除用于物理实体外，oscillate这个单词也可以用来表示某人“to move or travel back and forth between two points”，即情绪/状态/心里都抽象状态下的“来回摆动/犹豫不决”。具体使用场景如下：The fans of the 2022 FIFA World Cup Final have oscillated between optimism and pessimism. （2022年FIFA世界杯决赛的球迷在乐观和悲观之间摇摆不定。)/Her moods oscillated between depression and elation.（她的情绪在沮丧和兴高采烈之间摇摆不定。）
