It would be contrary to legal precedent to hear him.听取他的陈述是不符合司法惯例的。 Overturning a legal precedent is no easy matter.推翻一项法律先例绝不是一件容易的事情。The judge's ruling was based/founded on legal precedent.法官的裁决是基于具有法律效力的判例做出的。The judge's ruling is based on legal precedent.法官是基于法律判例作出的裁决。