(1) The milestone which marked the beginning of the modern age of computers was the development of the

transistors.This device was significantly smaller than the electronic tubes,requied much less electrical power to operate,and generated very much less heat.With the subsequent development circuits,it became possible to design equipment consisting of hundreds and thousands of transistors but requiring minimal space.

（1）标志现代计算机时代到来的里程碑是晶体管的开发成功
。这种器件比电子管小得多，工作所需的电功率也少得多 ，而且产生的热量也少得多。随着其后晶体管电路的发展
，设计由成百上千个晶体管组成而只需要很小空间的设备成为了可能 。

(2) To most people,the invention of the transistors meant portabie radios.But to t