part 1.images of the object as an icon, a literal representation, its physical quality.
part 2: images of the object connotes a new meaning.
I put an apple under the mask to signify eye , as “you are the apple of my eye”.
The bus stop signifies “travel”, an apple in Chinese signifies” safety”, combine them together it signifies” have a safe trip”.
Here, the apple signifies the absence of the officer
The apple signifies the experimenter.