虽然XKMS使用的密钥绑定信息没有寿命，但是底层pki颁发的凭证偶尔也会有这么一段时间，过了这段时间之后就要周期性地更新。
While there is no lifespan for the key binding information used by XKMS, the credentials issued by the underlying PKI occasionally do have a time span that must be renewed periodically.
你如何设计出一个线路，可以使雨刮在完成一个周期后停下来，一段时间后再运行一次？
How do you design a circuit where the wiper comes to a stop at the base of the windshield and then goes into its cycle again?
于是我们修正了这个时间周期，我们发布了jQuery 1.3，你可以注意到我们是如何赢回用户，甚至在一段时间内提高了市场占用率的。
We fixed that this time around - we released jQuery 1.3. Note how we instantly picked up our users and even grew our share during that time period.
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