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.
商业周期这个术语用来描写每隔一段时间发生的一般商业活动的扩展和收缩。
The term business cycle is used to describe the ups and downs in general business activity that recur over time.
这是神圣的旨意，必将如计划的一样发生，而且会在二元周期结束后很长一段时间内继续。
That is divinely decreed and will take place as planned, and will continue long after the cycle of duality has finished.
每种动物都要在24小时的周期内睡上一段时间，被强迫性剥夺睡眠的人肯定甚感折磨。
Every animal does it at some point in the 24-hour cycle and people who are forcibly deprived of sleep are effectively undergoing torture.
假如地球磁极逆转而造成生物大量灭尽，那就不难表明为何每隔一段时间，使地球文明周期性的毁灭。
If the Earth's magnetic pole reversal caused by biological extinction, it is not difficult to explain why from time to time, so that the periodic destruction of the Earth civilization.
最后生产商根据平均价值来制定价格，这样产品的价格在一段时间是稳定的，且生产商也能够在整个生命周期的不同时期得到相应的折扣价格。
This kind of price will keep stable in a period of time and the discount price of the whole lift-cycle in different periods will also come out.
垂直组表明在一段时间内（多个时钟周期期间）利用了三个执行单位。
The vertical sets indicate the utilization of the three execution units over time (during multiple clock cycles).
所以，人们对股票价格上涨的反应反过来又会引起股票价格的进一步上涨，而且这个周期在一段时间里反复发生。
So rising prices feed back into more rising prices, and the cycle repeats again and again – for a while.
在中国经济周期的格局尚未稳定，所以它不是可以说，我们已经进入了一段时间。
The pattern of economic cycles in China is not yet that stable, so it's not appropriate to say that we have entered a certain period.
两个汽车设计周期的时间跨度不少于七年，这就意味着克莱斯勒还将持续困顿好长一段时间，至少从财务的角度讲是这样的。
Of course, two automotive design cycles translate into at least seven years. So that means Chrysler is going to go "dark" on us for a while, at least from a financial standpoint.
每隔一段时间我们的肌肤会周期性自我新陈代谢，新生新的肌肤细胞。
Amazingly, our skin renews and regenerates itself naturally every few weeks, replacing older cells with vital fresh new ones.
此算法在每轮运行过程中，汇聚点只需去指定的区域收集数据，并在此区域停留一段时间，就能确保本轮的生命周期最优。
In each running round of this algorithm, mobile sink only need to collect datum from the designated area and stay in this area for some time, which can ensure optimal to the life of this round.
此算法在每轮运行过程中，汇聚点只需去指定的区域收集数据，并在此区域停留一段时间，就能确保本轮的生命周期最优。
In each running round of this algorithm, mobile sink only need to collect datum from the designated area and stay in this area for some time, which can ensure optimal to the life of this round.
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