Utopian communities always postulated the concurrence of their members in the task of creating a cooperative commonwealth.乌托邦社会总是假定其成员会通力合作，共同建设合作共和国。Freud postulated that we all have a death instinct as well as a life instinct.弗洛伊德假定我们都有生存本能和死亡本能。It has been postulated that the condition is inherited.有人认为这种疾病可能是遗传的。Scientists have postulated the existence of water on the planet.科学家们假定这个星球上有水存在。