But analog control system has some shortcomings: complexity, unhandy, and so on.

然而模拟控制系统有着不稳定、实现复杂、不容易升级等缺点。

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The output can be more specific than just specifying the analog pin number, but the generic number allows flexibility because it does not tie down any one pin to any one job.

输出也可能比仅指定模拟管脚编号更为具体，但是本机编号灵活性更好，因为它不会将任何一个管脚束缚到某一项作业上。

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"We still teach students analog X-ray techniques, but the emphasis is on digital radiography," clinic director Herbert said.

“我们也会教学生使用模拟X光技术，但教学重点是数字放射显影术，”诊所主任赫伯特说。

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Then we switched to digital but analog was still operational and the antennas were still external.

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But the analog world is one of shortages, because there is a shortage of great analog engineers in the U.S. and throughout the world.

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Vannevar Bush died long before the launch of Forbes.com, but he built analog computers in the 1920s and described a mechanism that anticipated hypertext and the Internet in the 1940s.

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