点对点：允许使用这共用档案、电脑能力、 网路、频宽、和容量的电子档案交换系统。

Peer-to-peer: Electronic file swapping systems that allow users to share files, computing capabilities, networks, bandwidth and storage.

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第二类是分散式线上服务，比如档案储存系统、资料库、 网站代管、串流媒体（如线上影像） ，以及高阶网路搜寻引擎。

The second is distributed online services, such as file storage systems, databases, hosting of web sites, streaming media ( such as online video ) and advanced web search engines.

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此课程包括可透过网路取得的一份以教授的著作《运输系统导论》为基础扩充的、超过五百张授课投影片的PD F档案。

This course includes online access to an expanded set of more than 500 lecture slides in PDF format, based on the instructor's book Introduction to Transportation Systems.

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