subsist       
verb [ I ]  formal uk/səbˈsɪst/ us/səbˈsɪst/
 维持生计;勉强生存
to get enough food or money to stay alive, but no more
  The prisoners were subsisting on a diet of bread and water. 犯人们靠面包和水勉强度日。 
 Synonyms: existsurvive
 
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