survivalism
noun [ U ] uk/səˈvaɪ.vəl.ɪ.zəm/ us/sɚˈvaɪ.vəl.ɪ.zəm/
活命主义，生存主义（指为将来的紧急情况做准备的做法，例如，收集大量的食物和学习如何在户外生活）
the practice of preparing for future emergencies, for example, collecting large amounts of food and learning how to live outdoors
For him, survivalism started as a hobby and became a way of life. 对他来说，生存主义最初是一种爱好，后来成了一种生活方式。