这意味着当多个进程和线程可以在同一时间从同一数据库读取数据，但只有一个可以写入数据。
This means that while multiple processes and threads can read from the same database at the same time, only one is able to write.
这意味着当多个进程和线程可以在同一时间从同一数据库读取数据，但只有一个可以写入数据。
This means that while multiple processes and threads can read from the same database at the same time, only one is able to write.
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