词汇	dead cert
释义	dead cert n.拿得准的事绝对确实的事
随便看	information unit information unit exchange technology information unit separator information unsymmetry information viewpoint information violence information un-symmetry information update In-formation update information updating information updating and monitoring information usage information use information user information user education information users information user satisfaction Information User Studies information using information utility information utility function information utility theory information utilization information vacuum Information Valence