第四代计算机比其他三代更难以定义。
The fourth generation of computers is more difficult to define than the other three generations.
微处理器是对第四代计算机的问世的最重要的贡献之一。
One if the most significant contributions to the emergence of the fourth generation of computers is the microprocessor.
也许在第四代计算机开始的最重要趋势是微型计算机的增长。
Perhaps the most important trend that began in the fourth generation is the proliferation of microcomputers.
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