世The world. Also refers to 30 years. During a person's life. A lifetime. The period of time before a person inherits a position from his parents and passes it on to his children. To pass on from generation to generation. A period of time. The world. Society.
乃In other words. For that reason. So. A long time ago. In the past. You. A second-person pronoun for a person of equal or inferior status. The word for "no" is used in particles.
