There is no expiry on a cache manifest, so everything stays cached unless the user clears the cache or the manifest file changes.

缓存清单没有过期一说，因此所有资源都将保持缓存状态，除非用户清空缓存或清单文件更改。

youdao

No, you see, it's within the expiry date.

没有啊，您看，还在有效期内呢。

youdao

Such notice shall under no circumstance be given later than two weeks after the expiry of the period given in Clause 52.

在任何情况下，此通知应在52款规定的有效期后两周内发出。

youdao

There is no expiry date, no list of approved retailers, no restrictions on transferring it.

ECONOMIST: Bribes and fines in fake money won't work

There is also an expiry function, after which no one can open them -- same for documents.

CNN: Cyber-security enters boardroom

Research from LV Car Insurance shows that nearly a fifth of drivers they interviewed had no idea when their licence would run out, even though the expiry date is clearly shown on the front of the licence.

BBC: Driving licence fines threaten two million drivers