The application command function is implemented by a group of general functions, which send and receive the data.

应用层协议采用一组通用函数实现，其中主要是数据接收和发送函数。

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Since last autumn, people from outside the EU applying for a visa to join their spouse or partner now have to prove they have a basic command of English before their application is approved.

BBC: Tougher English rules for immigrants on way - Cameron

The new software, Hanspal says, is an attempt to make AutoCAD for the Mac look and feel like any other Mac application, while retaining unique AutoCAD features such as command shortcuts.

FORBES: AutoCAD Is Back On The Mac (And On The iPad, Too!)