specifying a user-defined information item in the context of IFC in the IFC Menu
在IFC菜单下的IFC协议框架内说明用户自定义信息项
你这东西好像是什么工程学的东西,太深奥了,自己看附件吧,你的句子出自那里.
An information item of an FP can be added in three ways. The options include adding information items by selecting existing FPs, selecting an IFC element from the IFC Menu shown in Fig. 11, or specifying a user-defined information item in the context of IFC in the IFC Menu.
大意是有三种方式添加FP,·······.