Income inequality can in principle be affected more swiftly than mobility through changes in taxes and spending.

收入的不平等问题原则上比社会流动性问题更容易改善，前者可以通过税收和支出的变化加以调节。

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The technical background and principle of Ion Mobility Spectrometry technique is introduced in the paper.

介绍动态离子分析技术的技术背景和原理。

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This article introduced a gas testing system, briefly elaborating work principle of the ion mobility spectrometry, hardware component and software design.

介绍一个气体检测系统，简要阐述了离子迁移谱仪的工作原理和系统的硬件组成和软件设计。

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