機會成本

机 = 几 + 木 : Joan of Arc (ji) made a machine (机) that fully automatically manufactures tables (几) out of Christmas trees (木) and tests it in front of the space station (Ø1).

会 = 云 + 人 : Helga horse is almost fainting when she enters the Eiffel Tower's bathroom. Neanderthal man is giving off an extraordinarily smelly cloud. She didn't even think that this was possible at all.

成 = 万 + 戈 : Mnemonic symbol: a progress bar stuck at 99%.

成 = 万 + 戈 : Charlie Chaplin is queuing at the engine's kitchen, which is blocked by a neuron until the progress bar above shows 100%. Unfortunately it has been stuck at 99% for two hours now. If it doesn't finish soon, Charlie will get completely mad and destroy the neuron himself with his spear.

成 = 万 + 戈 : Mnemonic symbol: a progress bar stuck at 99%.

成 = 万 + 戈 : Charlie Chaplin is queuing at the engine's kitchen, which is blocked by a neuron until the progress bar above shows 100%. Unfortunately it has been stuck at 99% for two hours now. If it doesn't finish soon, Charlie will get completely mad and destroy the neuron himself with his spear.

本 = 一 + 木 : Beelzebub (b) finds a Christmas tree (木) in the encampment ((e)n3) and feels like eating its roots (本). He uses a flute (一) to chop the roots right off.