他在摔倒后，膝盖上留下了一道很深的伤口。
He got a deep ___laceration on his knee after the fall.
那次失败的演讲给他留下了深深的心理创伤。
The failed speech left deep psychological ___lacerations on him.
失去亲人在他心里留下了一道难以愈合的伤口。
The loss of his loved one left a deep ___laceration in his heart that wouldn't heal easily.
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