英语听力精选进阶版 14212（在线收听）

Haiti cholera victims threaten UN

Vocabulary

cholera

a serious disease, caused by drinking infected water

epidemic

when a disease spreads without control

sewage

human waste

originated

started

endemic

present in a particular area

unprecedented

something which has never happened before

immune

not able to be affected by something bad; protected

mediation talks

conversations to help reach an agreement

to insist

to say something with force

catastrophic

extremely harmful