资料来源 : pyDict

出轨

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

Derailment \De*rail"ment\, n.
   The act of going off, or the state of being off, the rails of
   a railroad.

资料来源 : WordNet®

derailment
     n : an accident in which a train runs off its track