I, (NAME), do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice. So help me God.
“我谨庄严宣誓,我决心维护和捍卫合众国宪法,防止被国内外一切敌人侵犯。我必忠勤尽责,根据统一军队法典和规章纪律,服从合众国总统和其他上级军官的命令,愿上帝助我。”
http://usmilitary.about.com/od/joiningthemilitary/a/oathofenlist.htm