Ozone is best known for its role in screening the Earth from harmful ultraviolet rays from the Sun.

臭氧最广为人知的作用是保护地球免受太阳紫外线的伤害。

What they find could provide clues to what might happen worldwide if ozone depletion continues.

他们的发现可以揭示如果臭氧持续减少，世界范围内可能会出现什么情况。