VOA慢速英语:美国官员称伊朗发送威胁邮件干预美国大选

adversaries –n. opponents; enemies

confidence – n. a feeling of trust or belief

intimidate – v. to make someone afraid

obtain(ed) – v. to gain or get something usually by effort

preference – n. a feeling of liking or wanting one person or thing more than another person or thing

undermine – v. to make someone or something weaker or less effective usually in a secret or gradual way