to describe sth as / an analogy / a simile / a metaphor / an allegory
喻
=
俞
+
口
:
Yu the Great (yu) and Yu Xiulian (俞) are competing in the space station's bathroom (Ø4). Their subject is a mandarin (口) floating between them, and they both try and find better and better metaphors (喻) and allegories (喻) about the mandarin.