Cellular systems have evolved in four major phases or generations.

蜂窝系统的进化经历了四个主要阶段，或者说代。

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An introduction is given to some commoanly used speech coding standards in digital cellular systems.

介绍了用于数字蜂窝系统的一些主要语音编码标准。

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The handoff events occur at a much higher rate in sectored cellular networks than in traditional cellular systems.

在目前的跨区域连接方式中，扇型微蜂房式的网络系统比传统的微蜂房式系统有更高的传输速度。

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In fact, of all the systems of cellular differentiation that are known in our bodies, probably hematopoiesis is the best known.

事实上,我们体内已知的,所有由细胞分化成的系统中,造血系统也许是最为人所熟知的

耶鲁公开课 - 生物医学工程探索课程节选

It commended the traditional fixed and mobile phone networks in the UK in this respect, but raised a flag about the introduction of the newer 4G cellular systems.

BBC: UK 'can cope with solar superstorm'

The "killer applications" of speedy networks (which theoretically can transmit data at 40 times the rate of conventional cellular systems) have been widely touted to be portable videophones, plus access to Internet-based broadband content: games, music and shopping.

CNN: Stuck On the Runway

Profits are off, sales growth has slowed dramatically and the company's market shares in cellular phone systems are slipping.

FORBES: Analytic myopia