If might be an image, a comparison, the finding of likeness between unlike things which is at the heart of metaphor and simile making.

也可能是一个意象，一个对比，在不同之物中寻找到的相同点,而这也是隐喻和明喻的内涵。

普林斯顿公开课 - 人性课程节选

This is another turn on that image of man's "resinous heart."

这是说人树脂般的心的一种转变“

耶鲁公开课 - 现代诗歌课程节选

And you'll recognize some of the parts of the image, you can see the ribcage here, the bones, you can see the heart is this large bright object down here.

你们会认出图中的一些器官,胸腔在这儿,这是骨骼,心脏是下面这个大而亮的物体

耶鲁公开课 - 生物医学工程探索课程节选