充足理由律

充 = 亠 + 允 : Mnemonic symbol: a charger for your mobile phone. Chantal Chicken (chu) has to charge her mobile phone, but the only charger (充) is outside in front of the engine ((e)ng1). Without any better option she waits outside in the cold wind for her phone to charge until she gets a runny nose (允). Lacking tissues she has to blow her nose into her beret (亠).

足 = 龰 + 口 : Mnemonic symbol: a football. Zapatista Zebra (zu) wants to pimp his football (足) in the space station's kitchen (Ø2). He thinks that a few more vitamins wouldn't hurt, so he extracts the vitamins from a mandarin (口) with a syringe (龰) to inject them into his football.

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.

由 = 丨 + 曰 : Mnemonic symbol: 自由古巴， a cuba libre. The character 由 itself even looks like a cuba libre.

Maud Younger (y) is taking part in a charity auction in the outhouse's kitchen (ou2). She is auctioning the dinosaur bone (丨) next to her and is speaking into a microphone (曰). In the other hand she is holding a cuba libre (由), and she is already quite drunk.

律 = 彳 + 聿 : Loki (lü) wants to prove the inverse square law (律) of electrostatics in the space station's bathroom (Ø4). He repeatedly rubs a decorator's brush (聿) against the soles of his black sneakers (彳) and thereby transfers electrons from the shoe soles to the brush. Now that both are charged, they will attract each other according to the inverse square law (律). To measure the amplitude, Loki uses Hook's law (律): when the black sneaker is attracted to the brush it will bend the bristles of the brush until the two forces cancel each out.