机器人三大定律：
1.A robot may not injure a human being or, through inaction, allow a human being to come to harm.
一.机器人不得伤害人类，也不得见人受到伤害而袖手旁观
2.A robot must obey orders given to it by human beings, except where such orders would conflict with the First Law.
二.机器人必须服从人类的一切命令，除非这与第一定律冲突
3.A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.
三.机器人必须保护自身的安全，除非这与第一、二定律冲突
