英语听力精选进阶版 14022（在线收听）

Who is tweeting in London?

Vocabulary

twittersphere

people using the social networking site, Twitter, in a particular place

GPS (Global Positioning System)

satellite technology

tablets

small, portable computers

portion

part, percentage

pre-eminence

dominance, surpassing all others

influx

arrival of large numbers

estimated

approximate

to throw up

to reveal

wrongly

incorrectly

lol

'text language' for 'laughing out loud'