它们的触角和外壳帮助他们探测和保护自身安全。

Their antennae and shells help them to detect and protect the security of themselves.

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人类的这种正常反应是用来保护自身的，这种反应向我们发出危险信号，让我们做好应对危险的准备。

This normal human reaction is used to protect us by signaling danger and preparing us to deal with it.

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雨林有自己完善的系统来确保自身的生存；高大的树木有枝叶形成的树冠层来保护自身，树冠也保护着矮小的植物以及动物不受暴雨、酷暑及强风的侵扰。

Rainforests have their own perfect system for ensuring their own survival; the tall trees make a canopy of branches and leaves which protect themselves, smaller plants, and the forest animals from heavy rain, intense dry heat from the sun and strong winds.

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That's passing laws that protect people from themselves, seatbelt laws, for example, or motorcycle helmet laws.

即制定保护人们免受自身行为伤害的法律，诸如系安全带，骑摩托车带头盔的法规。

耶鲁公开课 - 公正课程节选

The study of immunology is the study of mechanisms that your body uses to protect itself from mainly from foreign pathogens like viruses and bacteria.

免疫学研究身体,采用何种机制来保护自身,免受外源病原体如病毒和细菌的伤害

耶鲁公开课 - 生物医学工程探索课程节选

How do I give up my right to do whatever is in my power to secure my person or my possessions, when I have no expectation, you might say, ? that others around me are prepared to do so as well?

我怎么能在我不期望,身边的人会这样做的时候，放弃我保护自身和财产安全，不受侵害的权利？

耶鲁公开课 - 政治哲学导论课程节选