而在动态语言中，只有很有限的信息是可用的，这使得优化器的选择更加困难。
In a dynamic language, fewer such clues are available for the optimizer, making optimization choices harder.
这是因为，在静态情况下，<dot notation> 表示两种不同的资源，而在动态情况下，则是同一种资源。
This is because, in the static case, the <dot notation> means two different resources, while in the dynamic case, it is the same resource.
认知无线电可以通过动态频谱接入技术来有效的提高频谱的利用率，而在动态频谱接入中信道选择策略的优劣直接影响着系统的性能。
Cognitive radio can effectively improve the utilization of spectrum through dynamic spectrum access technology, in which the channel selection affects directly the performance of the system.
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