Fat has twice the calories per unit weight than protein or carbohydrate sugar has, as a consequence, has the greatest survival value.
脂肪单位体重的卡路里含量是蛋白质和碳水化合物的两倍，因此，有最能维持生存的价值。
2
Throughout history, the family has been a vital unit for survival.
有史以来，家底就一直是一个生存的重要单元。
3
Article 8 the State protects wildlife and the environment for its survival, and prohibits the illegal hunting, catching or destruction of wildlife by any unit or individual.