The incrementing of the USN is not, strictly speaking, under your control.
严格来说,USN的递增是不受我们控制的。
In such cases, the USN value has a special value that signals the CE server to skip the USN check.
在这些情况中,US n值有一个表示CE服务器跳过usn检查的特殊值。
When you fetch an object from the server, the USN is also fetched and brought to the client side.
当您从服务器获取一个对象时,USN 也被获取并传递到客户端。
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