它旨在表明紫外线造成不利健康后果的潜在危险，并鼓励人们学会自我保护。

It is designed to indicate the potential for adverse health effects and to encourage people to protect themselves.

youdao

她学会了自我保护。

She had learnt to stand up for herself.

《牛津词典》

当我们回顾历史，我们学会了保护我们珍视的东西，学会了适应他人，学会了以新的方式实现自我，学会了拥抱新的勇气。

As we came into history we learned to guard what we valued, to accommodate ourselves to others, to learn new ways of being ourselves, to embrace new kinds of courage.

youdao