英文：In the 1940s, the first computers were bigger than cars. Now computers are getting smaller and better. Some computers are small and you may ignore them.

There may be a computer in the TV or washing machine. You rely on computers much more than you realize.

We can calculate by computer. They are faster than us and almost never make mistakes. We can also type and draw things with them.

In addition, computers can also do important jobs such as operating railways, flying planes and spaceships.

原文：在20世纪40年代，第一批电脑比小汽车还大。现在电脑正变得更小更好。一些电脑很小，你可能会忽略它们。可能在电视机或洗衣机里有一台电脑。你依赖电脑比你意识到的要多得多。

我们能用电脑计算。它们的计算速度比我们快而且几乎从不出错。我们也可以用它们打字和画东西。另外，电脑也可以做像操作铁路、开飞机和宇宙飞船这样重要的工作。