1. Electric power is the antecedence to the development of the national economic. 国家经济的发展，电力是先行。
2. It should accord to the regulate of law, the requirement of occupation or duty, the legal action, the action of antecedence and so on. 不作为犯罪中的义务来源于法律明文规定的、职业或职务道德上要求产生的、基于法律行为产生的、先行行为引起的等法律义务。
3. It has an important effect on the antecedence tunnel and results in displacement and stress increase when the later tunnel is excavated. 后行隧道开挖对先行隧道围岩的受力变形有很大影响，后行隧道开挖导致先行隧道洞周位移和应力大幅度增大；
