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| natural risks prevention Precautionary measures, actions or installations implemented to avert the probability of harm to humans, property or natural resources posed by conditions or events in the environment neither initiated nor formed by human activity (谨慎的措施、行动或者运行装置以避免产生危害人类、财产或者自然资源的条件或事件的可能性，这些条件或事件既不是人类活动引起的也不是人类活动形成的。) | |||
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