The open and close method calls may actually translate into reserving and releasing a live connection from the application connection pool.
open和close方法调用实际上可能转换成在应用程序连接池中保留和释放一个实时（live）连接。
The open and close method calls may actually translate into reserving and releasing a live connection from the application connection pool.
open和close方法调用实际上可能转换成在应用程序连接池中保留和释放一个实时（live）连接。
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