This approach is also difficult to maintain as the system changes and is hard to drill into.
当系统变化时，这种方式既难维护，也很难深入进去。
It is also critical that the topology information is live, that it is updated as the system changes.
而且，拓扑信息是活动的(即它随着系统的更改而更新)也非常重要。
As the system changes over time some level of security should keep up, and even improve if new security holes are discovered.
因为随着时间的推移系统会更改，所以，如果发现新的安全漏洞，应保持甚至提高安全级别。
At that point, the system changes from asynchronous behavior to synchronous behavior, where the producer can enqueue messages only as fast as the consumer can dequeue them.
当队列满员时，系统从异步行为切换到同步行为，这时，消息生成者生成消息的速度只能与消息使用者使用消息的速度一样快。
More specifically, if the threshold carrier densities are different before and after the system changes, the small signal analysis should be used very carefully.
具体地说，在损耗调制的情况下，系统变化前后的阈值载流子密度不同，此时小信号近似分析可能会失效，因而使用时需慎重。
The system changes traditional working mode of thesaurus development. It can satisfy the requirement in network environment and make data processing, updating and maintenance more convenient.
该系统能够改变传统叙词表编制模式，适应网络环境下叙词表编制工作的需求，更好地支持叙词表的数据加工、更新及维护。
The system changes traditional working mode of thesaurus development. It can satisfy the requirement in network environment and make data processing, updating and maintenance more convenient.
该系统能够改变传统叙词表编制模式，适应网络环境下叙词表编制工作的需求，更好地支持叙词表的数据加工、更新及维护。
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