You get an image of Milton here twitching his blue mantle, his cape over his shoulder, and dusting his hands and letting us know that that's over.

从中你们可以看到一幅弥尔顿撕扯着丝巾的图象，他的斗篷搭在肩上，拍了拍手，好让我们知道都结束了。

耶鲁公开课 - 弥尔顿课程节选

You can go up to her and put your hand on her shoulder and offer a hug and say,

你可以走过去，把手放在她的肩上，给她一个拥抱，说，

You look 课堂 - SpeakingMax英语口语达人

It watched the back of his neck and hat for a minute, and then a hand came in and sat on his shoulder.

他从后面看了看,那个人的脖颈和帽子，然后将手伸进了车窗,搭在了他的肩上。

耶鲁公开课 - 1945年后的美国小说课程节选

Maybe it could refer to either the poet or the sun throughout the entire line, if you think of the mantle blue as being the actual sky that the sun is able to twitch over his shoulder.

或者两者皆可,从整句的行文看来，如果你们把蓝色的丝巾看作是真实的天空的话,那么太阳的确是能够在他的肩上轻轻颤动。

耶鲁公开课 - 弥尔顿课程节选