The parallax barrier is tuned to the horizontal separation between the human eyes.

视差屏障被调节为可在平行方向区别人的两个眼睛。

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The horizontal separation between the limits of instrument (in clouds) flight airspace and those of the airways, air corridors and other airspace shall not be less than 10 kilometres.

仪表（云中）飞行空域的边界距离航路、空中走廊以及其他空域的边界，均不得小于10公里。

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An experimental study was conducted of the separation efficiency and separator resistance of a horizontal heat exchange mode based square separator under different air speeds and inlet concentrations.

对卧式热交换式方形分离器在不同风速和不同入口浓度下分离效率和阻力进行试验研究，并分析了运行工况分离性能。

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Within our system of horizontal federalism and separation of powers at the federal (and, separately, the state) level, courts do not have the power to enforce their judgments in the trenches.

FORBES: When Technology Disrupts Enforcement of Judicial Decisions

It's this separation of layers and horizontal flow of current that gives OLET its efficiency and it's believed that it could not only be used for (next) next-generation displays but also for on-chip optical interconnects.

ENGADGET: Organic Light Emitting Transistors might make us forget all about OLED