The paper introduces the structure, theory and mechanism of data communication net in this system, especially RS232/RS485 passive level conversion module.

本文介绍了该系统中数据传输网络的组成、工作原理及数据传输机制，特别是设计独特的RS-232与RS-485之间的无源电平转换接口模块。

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With passive income, when you stop working your income stays at the same level.

有了被动收入，当你停止工作时，你的收入仍然保持在同等水平。

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Availability is assured at the operating system level, allowing for transparent mitigation of active and passive network denial-of-service attacks.

它在操作系统级确保可用性，可以透明地缓解主动和被动网络拒绝服务攻击。

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"The people that are at the highest level of passive smoke are actually the ones reporting exposure in their own homes.

VOA: standard.2010.06.15

For example, the new guy is always watched like a hawk and assessed by associates boasting a greater level of seniority through various avenues, some passive, some direct.

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Active versus passive return comparisons tend to be limited to the asset class level.

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To the contrary, if the rental activity does not rise to the level of a trade or business, the fact that it is no longer treated as passive courtesy of the real estate professional rules will not change the fact that the rental income is considered net investment income.

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