一本正經

in deadly earnest / deadpan

in deadly earnest; deadpan

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

root / stem / origin / source / this / the current / original / inherent / originally / classifier for books, periodicals, files etc

first month of the lunar year

straight / upright / proper / main / principal / to correct / to rectify / exactly / just (at that time) / right (in that place) / (math.) positive

decent / honorable / proper / serious / according to standards

surname Jing

classics / sacred book / scripture / to pass through / to undergo / to bear / to endure / warp (textile) / longitude / menstruation / channel (TCM) / abbr. for economics 經濟|经济[jing1 ji4]