natural disaster frequently occurred
自然灾害频发
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Among various natural disasters, the flood and water-logging is the primary disaster, because its great regions were suffered and occurred frequently.
在各种自然灾害中，洪、涝、渍害是主要灾害之一，受害面积广，出现频率高。
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