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

And you'll see at the bottom, bug it says the first actual case of a bug being found.

然后程序就正常工作了，因此这就是第一个被发现的。

麻省理工公开课 - 计算机科学及编程导论课程节选

So that we can talk about things being beautiful to varying degrees, but we never come across beauty itself in the actual empirical world.

我们可以探讨,事物的不同程度的美丽,但是我们从不在现实世界中,直接碰到"美丽"这个东西

耶鲁公开课 - 死亡课程节选

What is it about Buddhism, what is the actual tradition you bring to that, is there a school of thought or being more specific, what is it?

佛教到底是要做什么，有哪些实际的传统惯例，有没有自成一派的学说,具体来说，佛教到底是什么？

普林斯顿公开课 - 人性课程节选

The heaven in this poem is so far from being the incorporeal - the spiritual heaven of orthodox Christianity that you have an image of an actual orgy, the festal orgy raging under the thyrsus .

这首诗所描绘的天堂与正统基督教所宣扬的,非物质的，精神的天堂是如此大相径庭,弥尔顿描绘了一副纵欲狂欢的场景,在神杖下纵欲狂欢。

耶鲁公开课 - 弥尔顿课程节选