本场对话的主题为“online chatting”， 聊天可能是人们最常见的沟通形式，尤其在家人朋友中最普遍，随着互联网的发展，聊天更多地在网上实现。那么接下来，我们来看一下就“online chatting”这一主题展开的一些常用的表述：
With the increasing development of science and technology, a growing number of people are obsessed with chatting online. Obviously, chatting online has become an unstoppable trend in our modern society. However, every coin has two sides, so is chatting online.
On the one hand, chatting online brings a host of convenience for people. Compared to the old communicative ways like writing letters, today’s people can contact their relatives and friends online with social applications whenever and wherever, which, to a great extent, reduces lots of obstacle brought by distance and shortens the time of communication.
Nevertheless, on the other hand, chatting online also has its downsides. Firstly, the Web is a virtual world, a place full of too many uncertainties, which means people may meet a great number of invisible threats. Secondly, being obsessed with chatting online does harm to one’s vision and personal relationship. For instance, chatting online for a long time may cause one’s eyes uncomfortable.
In my view, considering the advantages and disadvantages of online chatting, as people enjoy the convenience brought by online chatting, they should also control their time of online chatting properly and pay attention to their friends around. On in this way can they enjoy the benefits of online chatting well.