And you put lots of those together, you get the essentials of the modern computer: the arithmetic unit, the central control, the memory, the recording medium, the input and the output.
如果把这么多东西组合起来， 就可以组成现代计算机的基本部件： 算术单元，中央控制单元，内存， 存储介质，输入和输出设备。