“National Security Presidential Directives”的意思、由来-开放百科全书

词条	National Security Presidential Directives
释义	SeeNational security directive
随便看	Time Person of the Year Timepiece Time pieces Time Pieces: Best Of Eric Clapton Timepieces: The Best of Eric Clapton Time Pilot Time (Pink Floyd song) Time Planet Time point Time point set Time preference Time-preference Time preference theory of interest Time projection chamber Time Projection Chamber (TPC) Time Protocol Timequake Timer Time-resolved spectroscopy Time Reversal Time reversal Time reversal invariance Time reversal symmetry Time-reversal symmetry Time reversibility

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。