回天 [ㄏㄨㄟˊ ㄊㄧㄢ; hui2 tian1]
  lit. to reverse the rotation of the sky
  fig. to reverse a desperate situation
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  回天
  廻天
  かいてん
  noun (common) (futsuumeishi)
  changing the world
  turning the tide
  torpedo modified as a suicide weapon (used in WWII)
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