电脑系统

例句：

1. 1. I need to buy a new computer for my office.
   我需要买一台新的电脑给我的办公室。
2. 2.The computer has been repaired and is now working properly.
   这台电脑已经修好了，现在能正常工作了。
3. 3. Computers have revolutionized the way we work and communicate.
   计算机已经改变了我们工作和交流的方式。