in a private way, manner, or capacity 私下地;以私人方式(或身份) I must insist we speak privately. 我一定要坚持我们私下谈。 their children were privately educated. 他们的孩子都是在私立学校受的教育。 ■[often sentence adverb]used to refer to a situation in which someone's thoughts and feelings are not disclosed to others 私底下 privately, Robert considered that she was overreacting. 私底下,罗伯特认为她反应过激。