Legislation authorization ; the principle of necessary ; the principle of definitude .
立法授权；必要性原则；明确性原则。
Keywords : powers of interpretation and definitude , exertion , limitation .
关键词：释明权、释明权的运用及限制。
To define the conception of traffic accident on toad scientifically , first to definitude the lawmaking aim and the law character of road traffic safety law . Second to definitude the inherence essentials mad the outside essentials be made up of the conception of traffic accident on road , third to abide by phraseology rules .
According to analysis , this paper advances that the key to success of cooperative medical system is definitude of property right among different participants .
通过分析本文认为，合作医疗制度成功的关键是要明确各参与主体的产权。
A good governance structure of a cooperation means the establishment of its internal power balance mechanism , whose premise and basis is the definitude of power and responsibility .
