For example, concerns about the harmful effects of the sun's UV rays have for some time been resolved by the invention and dissemination of sunscreen agents.
例如，在经过若干时间的焦虑后，人们对太阳的紫外线有害影响的担忧已随着防晒霜的发明和普及而烟消云散。
Unless sun lovers continually reapply sunscreen, agents in the sunscreen itself can attack the skin and leave the body susceptible to ultraviolet radiation, researchers say.
研究人员称，除非热爱晒太阳的人们不断地反复涂抹防晒霜，否则防晒霜的成分本身会攻击皮肤，使身体更容易受紫外线辐射的影响。
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