Ha is the requirement that the data be available for dependent applications whenever required.

HA是指要求在依赖性应用程序需要数据时能够提供数据。

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Copper is an essential element for living organism, and transporting copper to copper -dependent proteins is a basic requirement for normal cellular metabolism.

铜是生物体不可缺少的一种元素，在细胞内把铜转运到含铜的蛋白质是细胞正常代谢的基本要求。

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The task-dependent layer brings forward the corresponding requests. After the admission control, task-independent layer guarantees the specified scheduling requirement by scheduling processes.

任务相关层根据任务的特性提出相应的调度要求，经准入控制后由任务无关层通过调度执行保证其特定的调度要求。

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The issue revolves around the requirement that a head of household provide more than half the support for a dependent child.

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