他们开发了《大学英语精读》（第三版）多媒体网络课件,这样就产生了以网络多媒体为媒介的互动.

They developed the multimedia network courses of Edition No.3 of College English Intensive Reading, which had brought about the interaction based on the medium of network multimedia.

They developed the "College English" (third edition) multimedia network courseware, thus creating a network of multimedia interactive medium.

They developed "college English intensive reading (third edition),multimedia network courseware,thus produced by multimedia network as the medium of interaction.

They developed the Web Multimedia Courseware of the《Intensive Reading of College English 》(The 3rd Edition), therefore, the interaction via web multimedia came into being.
希望能帮到你O(∩_∩)O