英语听力精选进阶版 14335（在线收听）

Weather 'behind ozone hole'

Vocabulary

phased out

used less and less

streaming through

continuously flowing from one side to the other (here, from outside the earth's atmosphere to inside it)

plays a key role

has a strong influence

fluctuating

continually changing

dominant driver

main cause

to clear

to become less and less until they disappear