If any resource is re-requested and dependencies have not changed then the cached representation is returned instead of being recomputed.
如果有资源被再次请求，并且依赖性没有受到任何修改的话，那么缓存的资源表示会直接被返回，系统无须再重新对其进行计算。
The purpose of session state is to keep information that is transient in nature and that cannot be recomputed from another state or the current interaction.
使用会话状态的目的是为了保存不能从另一个状态或当前交互重新计算的瞬时信息。
In the 2.4 scheduler, the timeslice recalculation algorithm requires that all processes exhaust their timeslice before their new timeslices can be recomputed.
在2.4版本的调度器中，时间片重算算法要求在所有的进程都用尽它们的时间片以后，它们的新时间片才会被重新计算。
The purpose of session state is to keep information that is transient in nature and that cannot be recomputed from other state or the current interaction (for example, the content of a shopping cart).
会话状态的目的是保持那些临时性的且无法从其他状态或当前交互重新计算的信息(例如，购物车的内容)。
Hence a node may obtain more observations for estimating previous location sets. Then the previous location sets are recomputed by the MCL method to improve the location accuracy of the present time.
待定位节点再利用蒙特卡罗算法迭代计算前面时间段的位置样本集，并充分利用观测值滤除较差样本，从而提高当前时刻的定位精度。
Hence a node may obtain more observations for estimating previous location sets. Then the previous location sets are recomputed by the MCL method to improve the location accuracy of the present time.
待定位节点再利用蒙特卡罗算法迭代计算前面时间段的位置样本集，并充分利用观测值滤除较差样本，从而提高当前时刻的定位精度。
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