与打印输出相关的数据库指示消息日志记录器元素已执行，并且System. out消息来自MDB。

The database related printouts indicate that the message logger primitive has executed and the System.out messages come from the MDB.

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指示器，记录器监控发动机、熔炉、电网、水库或其它系统运作状况的仪器；指示板或。

An instrument used to monitor the operation or condition of an engine, a furnace, an electrical network, a reservoir, or another physical system; a meter or gauge.

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指示器，记录器监控发动机、熔炉、电网、水库或其它系统运作状况的仪器；指示板或。

An instrument used to monitor the operation or condition of an engine, a furnace, an electrical network, a reservoir, or another physical system; a meter or gauge.

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