英语听力精选进阶版 13600

（单词翻译）

Tracking crime on Twitter

Vocabulary

scanning

to search with a scanner

airwaves

e.g. radio programmes or phone conversations

police radio conversations

private police conversations on wireless¹ devices

crime reporters

journalists that report on criminal activity

residents

people who live in an area or neighbourhood

monitor

to listen to

social networking site

a website used by many people to communicate e.g Facebook

Twitter followers

people who are interested in a person or topic on Twitter

reality

what is really happening

neighbourhood

a community in a town or city