non-defining

US /ˌnɑːn dɪˈfaɪnɪŋ/
UK /ˌnɑːn dɪˈfaɪnɪŋ/
"non-defining" picture
1.

非限定性的

a non-defining relative clause gives extra information about the noun or pronoun it refers to, but is not essential to the meaning of the sentence. It is usually separated by commas.

:
My brother, who lives in London, is a doctor.
我哥哥,住在倫敦的那個,是一名醫生。
The book, which was published last year, became a bestseller.
這本書,去年出版的,成了暢銷書。