Lethe is the river of oblivion or forgetfulness in the Underworld in Greek mythology. The dead would drink the waters of Lethe to forget their earthly existence.

• 这酹瑟河是希腊神话中的一条河流，人死后喝了它的水，就会忘记前世所发生的一切。所以希腊的酹瑟河水就相当于我们的孟婆汤。