pandemic
1.Widespread; general.
2.Medicine. Epidemic over a wide geographic area and affecting a large proportion of the population: pandemic influenza.
endemic
1.Prevalent in or peculiar to a particular locality, region, or people: diseases endemic to the tropics.
2.Ecology. Native to or confined to a certain region.
epidemic
1.Spreading rapidly and extensively by infection and affecting many individuals in an area or a population at the same time: an epidemic outbreak of influenza.
2.Widely prevalent: epidemic discontent.
这些英文解释也能帮你更好了解几个词的区别
pandemic
[pAn5demIk]
adj.全国流行的
epidemic
[epI5demIk]
adj.流行的, 传染的, 流行性
n.时疫, 疫疾流行, (风尚等的)流行, 流行病
endemic
[en5demIk]
n.地方病 adj.风土的, 地方的