have no precedent to go by meaning in English
无成例可循
无例可援
无前例可援
无先例可援
Examples
- Reform and opening up are new undertakings , so we have no precedent to go by ; all we can do is proceed in the light of the specific conditions in our country
改革、开放是一个新事物，没有现成的经验可以照搬，一切都要根据我国的实际情况来进行。