黄昏的光线逐渐暗淡下来，皮卡内黑漆漆的，但她知道占有者一直在盯着她。

The dusk light was failing and the interior of the pickup was dark but she knew the occupant was staring at her.

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或者，逐渐暗淡，终于慢慢地熄灭。

Or it dims and eventually dies out.

youdao

然而，这十年来，这些反对观点都逐渐暗淡。

But over the past decade, all these objections have weakened.

youdao

It refers solely to trees, and Vallombrosa is the place "where th' Etrurian shades / high overarch't imbow'r."

这个比喻指的就是树木，地点是瓦隆布罗萨,“在瓦隆布罗萨，厄特鲁利亚的光辉逐渐暗淡“

耶鲁公开课 - 弥尔顿课程节选

This is the initial part of the simile that describes the leaves: "thick as Autumnal Leaves that strow the Brooks / in Vallombrosa, where th' Etrurian shades / high overarch't imbow'r."

这是描写落叶的比喻的开始部分：,“他们人数众多，稠密得像秋天的繁叶,/在瓦隆布罗萨，厄特鲁利亚的光辉逐渐暗淡“

耶鲁公开课 - 弥尔顿课程节选