Then he grew quiet. He opened his eyes and said, "Let us pass over the river and rest in the shade of the trees."

VOA: special.2009.10.15

As you know, in classical literature the dead are referred to as shades, but here in Milton's simile "shades" merely means "shade trees."

在古典文学里，逝者常被用树荫来指代，而在这里弥尔顿的比喻“树荫“仅表示“叶绿成荫的树“

耶鲁公开课 - 弥尔顿课程节选

If these trees are still supplying shade, embowering the entire valley of Vallombrosa, the leaves haven't all fallen, of course.

如果这些树仍在为热门提供遮蔽，将整个村庄掩盖在树荫之下，这些叶子当然就还未凋落。

耶鲁公开课 - 弥尔顿课程节选