answer: Julia and #Person1# are talking about the network. Julia lists some advantages of it while #Person1# thinks it's a two-blade sword.
documents: #Person1#: Julia, what do you think of the network?
  #Person2#: Network is omnipresent nowadays. It's quite convenient for people. You see, we can download music and information from the Internet ; I can study from it, too. And the most of all, we can compose, send, and receive e-mails.
  #Person1#: Yeah, you are right. Internet makes our lives easier. But it's a two-blade sword.
  #Person2#: What do you mean?
  #Person1#: I mean Internet brings benefit a lot, but also some disadvantages. For example, many youngsters are addicted to the games and they neglect their study ; or some bad guys steal people's money online, etc.
  #Person2#: I agree. But I think although it has some negative effects, on the whole Internet does more good to us than harm.
  #Person1#: Yeah, you are right. But we have to know how to make good use of it.