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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From this came the mass of stringy stem-like supports that form between the two plates as they are pulled apart, as a logical conclusion of the idea of the separation of the two horizontal planes.

由此，才诞生了大量的粘性干样支持，形成两大板块之间，因为它们分开，作为一个合乎逻辑的结论的想法分离的两个横向飞机。

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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