名词
中文翻译：Unknown
同义词：
['appearance', 'emergence', 'manifestation例句：1. The occurrence of the disease is increasing in recent years.（近年来，这种疾病的发生正在增加。）']
例句：
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1. The occurrence of the disease is increasing in recent years.
近年来，这种疾病的发生正在增加。
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2.The new technology has a significant impact on the occurrence of pollution.
新技术对污染的出现有重大影响。
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3. The occurrence of the earthquake was sudden and unexpected.
地震的发生是突然且出乎意料的。