Hence, with second-generation computers, the size and cost of computers decreased, their speed increased, and their air-conditioning needs were reduced.

因此，随着第二代计算机的出现，计算机的体积和成本降低、速度提高，且它们对空调的需要减少。

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Although simple operating systems were developed for first-and second-generation computers, many of the features of modern operating systems first appeared during the third generation.

虽然为第一代和第二代计算机开发了简单的操作系统，许多现代操作系统的特征首先在第三代期间出现。

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Remintong Rand, now called Sperr-Rand Corporation, made several second-generation UNIVAC computers.

现在叫做Sperr - Rand公司，制造了一些第二代univac计算机。

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