名词
中文翻译：自然发生事件
同义词：
['natural event', 'natural phenomenon', 'natural disaster']
例句：
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1. Theweather is a natural occurrence that can be predicted with some accuracy.
天气是一种可以在一定程度上预测的自然现象。
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2. The earthquake was a natural occurrence that caused widespread damage to the area.
地震是一种自然现象，对该地区造成了广泛的破坏。
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3. The flood was a natural occurrence that threatened the lives of many people.
洪水是一种自然现象，威胁了许多人的性命。