Mnemonic symbol: a balloon. The Queen of Hearts is disappointed by her balloons. She expected them to float upwards, but in the space station's bathroom, They float randomly in all directions.
粗
=
且
+
米
:
Kitty Cat (cu) wants to store her sacks of rice (米) in a shelf (且) in front of the space station (Ø1), but the sacks are too thick (粗) and do not fit.