If you were to store the data in a real cache, then the system could discard parts of the cache to gain memory for other tasks because the client can always re-create the cached data.
如果要在真正的缓存中存储数据，则系统可能丢弃缓存的部分以获得用于其他任务的内存，这是因为通常客户机可以重新创建缓存的数据。
The platform only attempts to track those projects, though it might not succeed (for example, it may discard changes in order to save memory).
平台只是试图跟踪这些项目，尽管可能并不会成功(例如，为了节省内存，它可能会废弃一些更改)。
To save memory, Eclipse may discard the delta at any point.
为了节约内存，Eclipse可能随时抛弃delta。
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