dependent clause
noun [ C ] language specialized uk/dɪˌpen.dənt ˈklɔːz/ us/dɪˌpen.dənt ˈklɑːz/
从句，从属分句（不独立成句，但能够与主句组成一个完整句子）
in grammar, a clause that cannot form a separate sentence but can form a sentence when joined with a main clause
Synonym: subordinate clause