这个示例假设以前安装过oda或者试用许可证过期了，这让我们有机会看到试用许可证过期时发生的情况。
This example assumes you previously had ODA installed or that your trial license has expired, thus giving us the opportunity to show you what happens when trial licenses expire.
when _ fragment_expired方法只有在相关的缓存分段过期时才会执行。
The when_fragment_expired method will execute only when the associated cache fragment expires.
如果使用了过期的策略信息，或某人在查找信息时记录了错误的数字，那么还会出现其他的错误。
Other errors occur when expired policy information is used, or when someone writes down the wrong number when looking up information.
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