One of these little details that Milton has lifted rather directly is that of the river Lethe, the river of oblivion that was believed to flow in the underworld.

其中弥尔顿直接盗用的一个小细节,是遗忘之河，即忘川,忘川被认为在地狱流淌。

耶鲁公开课 - 弥尔顿课程节选