求翻译：计算机的作用很大啊：早期的计算机是用来进行科学计算的、后来计算机慢慢应用到政府机关、学校、商业领域进行事务处理。计算机可以高效的对文档进行编排，处理，数据库的出现更为当今社会信息爆炸式增长提供了一个便捷的处理工具（数据的保存、修改、查询、删除等）。计算机不联网，亦可以用来娱乐，电影、音乐、游戏（单机、局域网）都可以啊图形计算器通常指一种能够画图像、解联立方程组以及执行其它各种操作的手持计算器，大多数图形计算器还能编写程序。是什么意思？

Computer's role is very big: early computer was used for scientific calculations, then the computer slowly applied to government agencies, schools, commerce transaction processing. Computers can be efficient document layout, processing database appears more-explosion of growth in today's society provides a convenient tool (save, modify, query data, delete, etc). Computers are not networked, can also be used for entertainment, movies, music, games (single machine, LAN) can usually refers to a graphic calculator to draw images, solving simultaneous equations, and perform various other actions of handheld calculators, most graphic calculators you can also write a program.