1·The sufficient and necessary condition of possession justice is the both justice of acquirement and transfer.
持有正义的充要条件是获取与转让同时是正义的。
2·This paper gives sufficient and necessary condition of the decision method which can be applied to the design of system with outputs directly involving inputs.
本文给出了在系统输出直接含有系统输入时应用判定法的充要条件。