资料来源 : pyDict

徒劳的;永远做不完的

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

Sisyphean \Sis`y*phe"an\, a.
   Relating to Sisyphus; incessantly recurring; as, Sisyphean
   labors.

资料来源 : WordNet®

Sisyphean
     adj 1: of or relating to Sisyphus
     2: both extremely effortful and futile