开闭程序: open-close program; switching program detail>> 开闭汽缸: latch-release cylinder detail>> .
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For example, a program that USES NOS to open a database, count the number of notes in it, and then close it, works whether the database is local or remote.
比如，程序可以利用NOS打开一个数据库，计算数据库中的文档数目，然后关闭数据库，不管数据库是否在本地。
You open a Windows when you run an application and close the Windows when you quit from an application program.
当你运行一个应用程序时就的开一个窗口，从应用程序中退出，就关闭相应的窗口。
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