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

This blue chain here goes from 5' carbon all along the chain and there's a 3' carbon left open at the bottom.

这条蓝色的链,从5'碳开始一直向下延伸,以3'碳做为链的末端

耶鲁公开课 - 生物医学工程探索课程节选

In fact, from Ale's point of view, this could be a blue hat.

事实上,从艾尔的角度看,这很有可能是顶蓝色的帽子

耶鲁公开课 - 博弈论课程节选

So essentially, we have two ethene or ethylene molecules here to start with where these blue are our 2 s p 2 hybrid orbitals, so you can see that for each carbon atom, one is already used up binding to another carbon atom.

本质上，我们从两个乙烯分子开始,蓝色的是2sp2杂化轨道，你可以看到，对于每一个碳原子，其中一个已经用来和另外一个碳原子成键。

麻省理工公开课 - 化学原理课程节选

This is just a picture of that little box, so it's going to turn out it goes from, the pink line goes from here to here and the blue line goes from here to here.

这是那个小方格的放大图,这些线如图所示,粉色的线从这一点到这一点,蓝色的线从这一点到这一点

耶鲁公开课 - 博弈论课程节选