talk of; talk about; talk on 这组词均可以表示“谈”，但程度不同。talk of 只表示“涉及”;talk about 表示谈细节;talk on兼有议论。如： Talking of Shanghai, have you been there in summer?谈到上海，你夏天在那儿待过吗? What are you talking about?你们在谈论什么呢? They are talking on the book.他们在谈论这本书。 talk ...