坐失良機

坐 = 从 + 土 : Zapatista Zebra (zu) sits next to a rubber chicken (从) on a clay (土) bench (mnemonic symbol for 坐) in the observatory's bathroom.

失 = 𠂉 + 大 : Sherlock (sh) locked himself out of the space station (Ø1)! He lost (失) his key (𠂉)! After he was floating in front of the space station for an eternity, a robot (大) came by with a lost+found box (失) which contained his lost key.

良 = 丶 + 艮 : Mnemonic symbol: A "thank you very much" card for being so good.

Everyday, Li Qingzhao (li) has been picking up the chewing gums (艮) from the ground of the anglepod's kitchen (ang2) with petal leaves (丶). One day, finally one guest approaches her and gives her a "thank you very much" card for being so good (良).

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).