测试网站只在很短的一段时间内（遵循每个部分无效的事件）遭遇数据库I/O瓶颈，但是很快就恢复了。
The test site is bottlenecked on database I/O for short periods of time following each partial invalidation event, but recovers quickly.
通知可用于无效的缓存对象，或者在对象被添加、替换以及移除时指定事件处理器。
Notifications can be used to invalidate cached objects or to specify event handlers when objects are added to, replaced, or removed from the cache. Performance improvements.
对一个已经设置为有信号状态的事件对象再次执行该函数是无效的。
她的父亲很周到，甚至一直追溯到许多事件，但无效是过于如此出人意料和令人吃惊的沟通薄弱。
Her father was very considerate, and even kept back many incidents, but the invalid was too weak for so unexpected and startling a communication.
这个事件的中心在于解决和控制开采中的安全和污染问题，而这种方法对于解决问题几乎是无效的。
It sounds like an inefficient process which would be difficult to manage and would do little to control the safety and pollution risks that are at the heart of this matter.
这个事件的中心在于解决和控制开采中的安全和污染问题，而这种方法对于解决问题几乎是无效的。
It sounds like an inefficient process which would be difficult to manage and would do little to control the safety and pollution risks that are at the heart of this matter.
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