资料来源 : pyDict

恭喜;祝健康[干杯用语]

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Prosit \Pro"sit\, interj. [L., 3d pers. sing. subj. present of
   prodesse to do good; pro for + esse to be.]
   Lit., may it do (you) good; -- a salutation used in well
   wishing, esp. among Germans, as in drinking healths.