This is because these update operations require synchronous writing to the database log.
原因是这些更新操作都要求同步地写到数据库日志。
Synchronous APIs for embedded local database
内嵌的本地数据库的同步API
So, now we're aligning our efforts with Google on things like the synchronous and asynchronous calls that must be made to the SQLite database in order to enable the offline capability.
因此，现在我们正与Google共同努力解决一些问题，例如为了具备离线能力，必须对SQLite数据库进行同步和异步调用。
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