amicus brief       
noun [ C ]  law mainly US specialized uk/ˈæm.ɪ.kəs ˌbriːf/ us/ˈæm.ɪ.kəs ˌbriːf/ (also amicus curiae brief, /ˌæm.ɪ.kəs ˈkjʊə.ri.aɪ ˌbriːf/ /ˌæm.ɪ.kəs ˈkjʊr.i.aɪ ˌbriːf/)
 法庭之友书状,指不直接涉案的人或机构向法庭提交的法律文书,以提供相关意见或信息
a legal document supplied to a court of law containing advice or information relating to a case from a person or organization that is not directly involved in the case
  Thirteen states filed amicus briefs in support of the Montana attorney general.  十三个州政府提供了法庭之友书状,以支持蒙大拿州的司法部长。 
 - More examples
 - The commissioner's amicus brief was at least in part responsible for Lear's victory in this hotly contested litigation.
 - The solicitor general often offers guidance on cases that don't directly involved the government, frequently filing amicus briefs on the merits in cases involving issues of public importance.
 - In reaching their conclusion, the court relied heavily upon the testimony of a court-appointed psychiatrist as well as an amicus curiae brief submitted by the Department of Mental Health of Kentucky.
 - Several anti-domestic violence groups joined together to submit an amicus curiae brief in the case.