[xiān lì]
precedent; previous case taken as example
set a precedent; create a precedent
开先例
have a precedent to go by
有先例可援
create a precedent for ...
为...创一先例
historic precedent
历史先例
There is no lack of precedents in this connection.
不乏先例。
If he is allowed to do this, it will be a precedent for others.
如果允许他这样做, 就会为别人开先例。