唐纳德·特朗普发布了一项行政命令，解密约翰·F·肯尼迪总统、他的弟弟鲍比·肯尼迪和民权领袖马丁·路德·金遇刺案的机密文件。 Uncertainty still surrounds the shooting of President Kennedy in Dallas in 1963, with suggestions of Cuban involvement.

例句 Franklin D. Roosevelt’s lightheartedness seemed undignified, while the youthful John F. Kennedy often felt compelled to suppress his sense of humor in public.【2018-2《华尔街日报》】 富兰克林·D.