to expire

基本解释

The most important part of performing HTTP caching is determining which objects can be stored in the cache, when they are to expire, etc.
执行 HTTP 缓存时，最重要的部分就是确定哪些对象可以存储在缓存之中，以及这些对象将在何时过期等。
But it assumes no additional spending for wars in Iraq and Afghanistan after next year and allows many of the president's record tax cuts to expire.
不过，这个预算没有假定明年之后再为伊拉克和阿富汗战争追加经费，同时也使许多布什实行的创记录的减税项目期满作废。
Answering questions in the couple's backyard, Mr. Obama made this point about a major issue linked to the economy - the question of extending Bush-era tax cuts that are due to expire this year.
在这对夫妇住家后院回答问题时，奥巴马总统对有关经济的主要议题，也就是有关延长今年底将到期的布什政府时代减税政策，提出了他的看法。

Many had hoped she would be freed late this month, when the current order for her detention was to expire.
And as for taxes, the Bush tax cuts as John said, are set to expire very substantially by the end of 2010.
至于在税收方面，约翰刚才也说过，布什的减税政策，会在2010年底，最终期满失效。
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Those are set to expire, I believe, next year,
那些要过期了，我相信，明年过期。
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The Bush tax cuts were renewed in 2010 and are now scheduled to expire in 2012.
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