and knowing that the sound image correlative to the concept tree is "arbor," right, arbor I can think of something like that , something in some way resembling that.

树这个词所对应的声音形象是,凉亭，对，凉亭,也就是像我画的树这样，至少是像这样的东西。

耶鲁公开课 - 文学理论导论课程节选

The footnote to your Norton here suggests that the gazebo is a summerhouse and by extension it's quite an extension the nationalist movement, and then, "even the whole temporal world."

书上的注释说,楼台指的是凉亭,可引申为民族主义运动，“甚至整个现世世界“

耶鲁公开课 - 现代诗歌课程节选