您可以发出以下选项和dbaccess命令直接保护子菜单。
You can directly obtain a sub-menu by issuing the following options along with dbaccess command.
文中对软件系统进行了深入的设计，给出了软件的总体结构、主要程序流程，详细说明了保护主站和保护子站的故障处理流程。
A detail design of the protection software including the software framework and program flow is presented, especially the fault treatment procedure.
如果我们现在不采取行动保护环境，我们会遗憾一辈子。
If we don't act to protect the environment, we will live to regret it.
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