形容词
中文翻译：自发的
同义词：
['natural', 'unrestrained', 'uninhibited']
例句：
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1. The spontaneousdecision to help the homeless was a great act of kindness.
自发决定帮助无家可归者是一个伟大的善举。
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2.The spontaneous outburst of joy at the sight of her friend filled the room with happiness.
看到朋友时自发的喜悦爆发让整个房间充满了幸福。
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3. The spontaneous wave of applause for the singer's performance was overwhelming.
对歌手表演的自发掌声如潮水般汹涌。