它包括基于光盘，网络，企业内部网，或互联网的自定进度学习。

It involves self - paced learning, either CD - ROM - based, network - based, Intranet - based or Internet - based.

youdao

它包括基于光盘，网络，企业内部网，或互联网的自定进度学习。

It involves self - paced learning, either CD - ROM - based, network - based, Intranet - based or Internet - based.

youdao