"非限定性定语从句"用英语怎么说

nonrestrictive attributive claus

'non-restrictive attributive clause' is not used as often as 'non-defining relative clause' or 'non-identifying relative clause' among English teachers, teacher trainers and native speakers.
Reference:
* 'An A-Z of ELT' p195 - Scott Thornbury
* 'Oxford Guide To English Grammar' 272-274 John Eastwood

nonrestrictive attributive clause