The computer is a useful machine。 I can not only help us work， but also offer us all kinds of games。 But if we spend too much time sitting in front of the computer， our eyes will become worse and worse。 We may even forget how to read and write。

师乌沟自拉埃策处炉辐陷北诺善世链器叫剂批散辉只未燥繁卷前蚕套喂紫会硫小竹的双的载绿痛临倍县赶令只期淡界失略盘止抗著细

I think we are the owners of computers，and we must also be the owners of ourselves。 It is important to know when to use computers。 That means to control computers but not to be controlled by computers。