本研究揭示城市大气环境污染调控原理，并提出治理方案。

This study discloses urban environment pollution regulating-controlling principles and puts forward controlling and improving schemes.

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清单5中的代码展示了这些微调控制项的工作原理。

The code in Listing 5 shows how these spinners work.

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介绍了一种以MB89P485 单片机为控制核心的汽车空调控制器的功能、原理和设计方案；

This paper introduces the function, principle and design scheme of an Automobile Air Conditioner controller that uses MB89P485 MCU as controlling core.

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