全球十大灾难：自然与人为的悲剧交织，警醒人类珍视生命。jav008

　　National Geographic assesses the contenders for the worst natural disasters of all time those events that had severe impact on human populations. As well as examining the deadliest, we will also explore the most powerful, the most wide reaching and epoch changing events. We explain how they occurred, why they created such mayhem and explain what makes them qualify as one of our... (展开全部)