英语听力精选进阶版 13815（在线收听）

Time to cross the road!

Vocabulary

authorities

organisations or governmental departments

guidelines

rules or official advice

sustainable

conserving or maintaining (a good environment)

a leisurely pace

a casual speed and not hurried

willing

prepared

system

procedures

huge scale

very large area (across the whole country)

patient

able to wait without becoming annoyed or anxious