in dead earnest; prim; sobriety; solemnity

1. 他裝作一本正經(jīng)，可是你看得出他是在開玩笑。
   He pretended to be serious, but you could tell that he had hi tongue in his cheek.
2. 一本正經(jīng)的態(tài)度，是肉體為了掩飾精神上的缺陷而作出的一手花招。
   Solemnity is a trick of the body to hide the faults of the mind.
3. 我從不知道亨利是高興還是煩惱，他總是一本正經(jīng)的樣子。
   I never know whether Henry is pleased or annoyed; he has a real poker face.

一的英語翻譯：

本的英語翻譯：

正的英語翻譯：

經(jīng)的英語翻譯：