Li Ming, who is in the room, wants to ask you some questions.李明在屋子里，他想问你几个问题。
上述主句是Li Ming wants to ask you some questions. 定语从句为who is in the room. 如删去从句则不影响句子的基本意思。
Many educators, who research in this field, say that everybody has one of three basic ways to process the world: visual, auditory or kinaesthetic.
The coursebooks, which my colleagues found very interesting, were useless for me.
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