📅  最后修改于: 2022-03-11 14:57:42.486000             🧑  作者: Mango
A disaster is defined as a "sudden or great misfortune" or simply "any
unfortunate event." More precisely, a disaster is "an event whose timing
is unexpected and whose consequences are seriously destructive."
These definitions identify an event that includes three elements:
Suddenness. Unexpectedness.