Aggression is a kind of innate survival mechanism, an instinct for selfpreservation, that allows animals to defend themselves from threats to their existence.
攻击性是一种天生的生存机制,一种自我保护的本能,使动物能够保护自己不受生存威胁。
2
She was held back by some sense of self-preservation.
一种自我保护意识使她没有贸然行动。
《牛津词典》
3
The police have the same human urge for self-preservation as the rest of us.