He was directly invited to join their party, but he declined it, observing that he could imagine but two motives for their choosing to walk up and down the room together, with either of which motives his joining them would interfere.
两位小姐立刻请他来溜达,可是他谢绝了,说是她们俩所以要在屋子里踱来踱去,据他的想象,无非有两个动机,如果他参加她们一起散步,对于她们的任何一个动机都会有妨碍。
曹老师好,再次请教您这个句子。这句话的which我理解是非限定性定语从句引导词,which为关系限定词,也有说是引导名词性从句,所以想请老师分析一下到底是什么。另外这句话常规顺序写应该是 his joining them would interfere with either of which motives. 那么which motives是指代前句的two motives吗?