Given a set of users and items, CF applications provide recommendations to the current user of the system. Four ways of generating recommendations are typical.
CF应用程序根据用户和项目历史向系统的当前用户提供推荐。
High voltage direct current (HVDC) aircraft electrical power generating system (EPGS) is a new type of aircraft power generating system.
飞机高压直流电源系统是一种新型的飞机电源系统。
Advertisement is a system of signs. The current semiotics can help the study of advertisement develop a more accurate discourse and decipher the secret of the ad. meaning generating.
广告是一种符号系统，当代符号学将帮助广告学建设更为精确的话语体系，破译广告意义产生之谜。
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