计算机课

例句：

1. 1. I need to buy a new computer for my office.
   我需要为我的办公室买一台新的计算机。
2. 2. The computer has been repaired and is ready to use again.
   这台电脑已经修好了，可以再次使用了。
3. 3. Computers have become an essential tool in modern society.
   计算机已经成为现代社会的一个重要工具。