基于扩展活动理论，论述了产品浏览与批注模型和网络会议模型。

On the basis of EAM, a view and markup model for product data model and a net-based meeting model are put forward.

youdao

基于扩展活动理论，论述了产品浏览与批注模型和网络会议模型。

On the basis of EAM, a view and markup model for product data model and a net-based meeting model are put forward.

youdao