expiration time

基本解释

The expiration time is set by default to one hour.
在默認情況下，過期時間設置爲一小時。
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，您可以使用每個緩存項的最長生命周期和過期時間來爲需要更新數據的特定用戶刷新緩存數據。
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.
通過指定作業激活或過期時間、重複執行模式、作業完成時的電子郵件通知等等，可以對作業提交過程進行自定義。

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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