卡拉OK

 Karaoke
   Karaoke is a welcome and popular source of entertainment. People all over the world are familiar with it. It enjoys popularity in get together (聚会) and evening gala(联欢晚会). Common folks (平民百姓) can simply sit in the living room and sing songs that best suit their tastes. Thus it enriches people＇s lives in a simple but creative way.
   Being an inexpensive and convenient source of entertainment, Karaoke is of various functions. Firstly, it enlarges our social circle and strengthens our bond (纽带). Secondly, Karaoke can remove the ban of social walls between people. Thirdly, it helps channel enthusiasm (热爱) into enjoyable and instructive pastimes (消遣). The list does not stop here.
   However, it can also be a nuisance. For instance, some fans sing loudly late at night, which disturbs others. For another instance, some suffer from a sore throat from excessive practice. Karaoke, in the final analysis, should be for the overall improvement of social civilization. Its enduring appeal should lie in the high quality of entertainment, not noise pollution.
范文分析  本文是篇说明文。第一段以评述卡拉OK为开头，除了分类定义(即一种娱乐形式)，还通过具体实例说明其受欢迎程度和普及程度。此外，卡拉OK在聚会、联欢晚会、百姓家起居室受欢迎也暗示其具有参与社交的功能，为下一段延伸说明与阐述奠定了基础。