theories 是 theory 的复数theoryKK [ˋθiɚi] /ˈθiɚi/发音名词1理论、学说His theory of evolution changed the way we see nature.他的演化论改变了我们看待自然的方式。2理论、学理In music, theory and practice should go hand in hand.在音乐上,理论与实作应该并重。3看法、推测、说法口语My theory is that she quit because of her boss.我的猜想是,她辞职是因为她的主管。片语1理论上、照理说In theory the plan works, but nobody has tried it.理论上这个计划可行,但还没有人试过。用这个字练口说→相关片语in theory