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| 乐观并发 (A method of managing concurrency by using a cached object's version information. Because every update to an object changes its version number, using version information prevents the update from overwriting someone else's changes) | |||
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| 乐观并发 (A method of managing concurrency by using a cached object's version information. Because every update to an object changes its version number, using version information prevents the update from overwriting someone else's changes) | |||
