需求层次理论

需 = 而 + 雨 : Mnemonic symbol: When it rains and you do not want to comb your hair again, you need a rain cape.

需 = 而 + 雨 : It is raining in front of the rain station. Because Xu Xian doesn't want to comb his hair again, he uses a rain cape to stay dry.

求 = 永 : Mnemonic symbol: a service request bell. You know, the kind you find in a hotel on a service counter.

求 = 永 : In the outhouse's kitchen, the Queen of Hearts sees a diamond ring and wants to have it immediately. Determined she rings the service bell endlessly to request the immediate handover.

层 = 云 + 尸 : The King of Chu (c) is enjoying a lasagna (千层面) in the engine's kitchen ((e)ng2) when suddenly a ghost (尸) surrounded by a dark cloud (云) appears and starts to haunt him. Terrified, the King of Chu drops the lasagna and runs away. The ghost reached its goal and starts devouring the lasagna himself.

次 = 冫 + 欠 : Mnemonic symbol: the cube, as in words involving 三次 relate to "cubic equations" or "cube (third power)". The King of Chu (c) pulls a popsicle (冫) out of the cube (次) in the space station's bathroom (Ø4) and leaves an IOU note (欠) on the cube.

理 = 王 + 里 : Li Qingzhao (li) and Martin Luther King (王) have the mission to find out the intrinsic order (理) and inner essence (理) of sunflowers (里) in the space station (Ø3). They grow a few sunflowers and care for them very meticulously, talking to them and everything.

论 = 仑 + 讠 : Lenny Lemur (lu) finds an advertising column (讠) in the encampment's bathroom ((e)n4) and on it a discussion (论) of his blackcurrant wine (仑). The discussion (论) is very negative and so Lenny angrily throws blackcurrants at it, messing up the ad.