expiration time

基本解释

The expiration time is set by default to one hour.
在默认情况下，过期时间设置为一小时。
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。
The job submission process can be customized by specifying job activation or expiration time, recurring execution pattern, notification via e-mail upon job completion, and so on.
通过指定作业激活或过期时间、重复执行模式、作业完成时的电子邮件通知等等，可以对作业提交过程进行自定义。

With very little time until expiration, front-month options activity is especially speculative.
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In this scenario the trader is happy to pocket the rich premium available on the options given the length of time to expiration and increase in implied volatility on top of the sharp rise in the price of the underlying.
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Overextended prices and the expiration of the first time homebuyer tax credit, coupled with fewer loans qualifying for federal assistance programs like the Home Affordable Modification Program, are putting pressure not only on homebuilders like those in the XHB, but residential REITs, too, could be an eyesore for shareholders in the near-term.
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