For example, you could use the maximum life and expiration time for each cached item to refresh cached data for specific users that need updated data.

例如，您可以使用每个缓存项的最长生命周期和过期时间来为需要更新数据的特定用户刷新缓存数据。

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Two views of the virtual extension of a Portal into Second Life; the first shows sensor data over time, the second streaming real-time audio/video into Second Life.

两张第二人生接口的虚拟扩展图片；第一张显示的是随时间变化的传感器数据；第二张正在向第二人生发送即时数据。

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The life span of the data saved to a session is, at most, from the moment the user accesses a domain to the moment when a user times out after a preset amount of time of inactivity.

保存在会话中的数据的生命期，最长是从用户访问域的那一刻到用户在预设的一段不活动时间之后超时的那一刻。

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The reason why smartphones are subsidized by carriers in return for long-term contracts is that smartphone users are widely recognized as heavy data users and bring a higher life-time value to carriers.

FORBES: China Mobile Going To $58 As China Becomes Smartphone Superpower

All companies can use real-time continuous data to monitor shelf-life, cash flow, debtors outstanding.

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Now one of the major manufacturers of data recorders says the company will look to extend their battery life to give authorities more time to find them after a crash.

CNN: Flight 447 sparks black box rethink