They are often successful in doing just that, so any companytrying to protect content using a DRM must frequently update it with new andharder to discover secrets.
他们刚好在这方面经常成功，所以试图通过使用DRM保护内容的任何公司必须经常用更难破解的密码升级它。
A website is designed to be more static than a blog, so you are not expected to update it as often.
网站会设计得比博客静态一些，那样你就不用经常更新。
So it is obvious that the accuracy of selectivity estimation depends upon how often you run UPDATE STATISTICS.
因此，选择性估算的准确性显然基于您运行UPDATESTATISTICS的频率。
Run the tests often. When you update, before you commit, during development. Running the test suite (or at least a relevant portion of it) should be part of your development cycle.
经常测试修改的时候要测，提交前要测，开发期间要测。运行测试套件(至少也是其中的相当的一部分)应该成为你开发周期的一部分。
They are often successful in doing just that, so any company trying to protect content using a DRM must frequently update it with new and harder to discover secrets.
他们往往干得很成功，因此任何想用DRM技术保护内容的公司，都必须时时为内容添加新的、更难被挖掘的秘密。
However, since it does not take account of the data update rate and data size, cache invalidation often takes place.
但由于没考虑到数据的更新率及数据大小，将会经常发生缓存失效。
However, since it does not take account of the data update rate and data size, cache invalidation often takes place.
但由于没考虑到数据的更新率及数据大小，将会经常发生缓存失效。
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