First, if some nodes in your cell are left down for extended periods of time (likely twice the key lifetime), the nodes can lose the ability to communicate.

首先，如果计算单元中的某些节点在一段时间(比如密钥寿命的两倍)内一直停机，它们就会丧失通信能力。

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The first part contains authentication service as the server and the second encrypted portion contains ticket lifetime and TGT session key.

第一部分包含身份验证服务及服务器，第二部分是加密的，包含票证有效期和 TGT 会话密钥。

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You can use this approach whenever the lifetime of the mapping must be tied to the lifetime of the key.

当映射的生命周期必须与键的生命周期联系在一起时，可以使用这种方法。

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In addition, DDR4 has been designed in such a way that stacked memory devices may prove to be a key factor during the lifetime of the technology, with stacks of up to 8 memory devices presenting only a single signal load.

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The key to solving this challenge came from calculating their Customer Lifetime Value (CLV).

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