英语听力精选进阶版 14251（在线收听）

Haiti cholera claims

Vocabulary

epidemic

a widespread outbreak of a disease

unprecedented

never having happened before

moral

what's accepted as the right and wrong way to behave

circumstantial evidence

facts that make something seem likely that it happened but do not prove it

source

place where it started

convened

organised an official meeting (of)

microbiological

study of very small living things

to sue

to make a legal claim against someone (here, the UN)

legal immunity

a situation where the law does not affect someone because of their position

bolster

make stronger