英语听力精选进阶版 14086（在线收听）

Texting turns 20

Vocabulary

spread

growth over a larger area

brevity

using only a few words or lasting a short time; shortness

a global phenomenon

something that happens everywhere in the world

volume

(here) the number or amount of something

messaging

system or process of sending messages

smartphones

mobile phones that offer extra functions such as email, internet access and data storage