名词短语
中文翻译：单一事件引起的不安
同义词：
['single incident upset', 'single occurrence upset', 'single event upset']
例句：
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1. The sudden cancellation of the concert left me feeling a little upset.
音乐会突然取消，让我有点不安。
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2. He was upset when he found out that his team had lost the game.
当他发现他的队伍输了比赛时，他感到很不安。
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3. The news of the accident caused a lot of upset among the passengers.
事故的消息让乘客们感到十分不安。