至关重要

至 = 一 + 厶 + 土 : Mnemonic symbol: one of these conveyor belts from which you pick up your suitcase when you arrived at an airport. James II of England (zh) finally got the package he was waiting for! He picks it up from the arrivals (至) in the bathroom of the space station (Ø4). In it is a flute (一), which he sticks into his nose (厶). He blows his nose, and boy, does a lot of clay (土) come out! He's glad to have a free nose again.

关 = 丷 + 天 : A mean crocodile (丷) is chasing Gitta Giraffe (gu) in front of the anthill (an1). It almost caught up, when an angel (天) appears and pushes its off button (mnemonic symbol for 关) to save Gitta Giraffe.

重 = 千 + 里 : Mnemonic symbol (from the shape of the character): this one looks like a space elevator. The two top strokes are the heavens, the two bottom strokes are the earth, and the part in between is the cabin (or climber) of the space elevator.

Chantal Chicken (chu) is working in the engine's kitchen ((e)ng2). Her job is to crush sunflower (里) seeds with a 1 kg weight (千) to get the kernels. Then she has to put the kernels into the cabin of a space elevator (重) to send them to outer space. This repeats (重) again and again day in, day out.

重 = 千 + 里 : Mnemonic symbol (from the shape of the character): this one looks like a space elevator. The two top strokes are the heavens, the two bottom strokes are the earth, and the part in between is the cabin (or climber) of the space elevator.

Julian Giant Squid (zhu) installed a space elevator (重) in the engine's bathroom ((e)ng4). For the maiden trip, and as a stress test, he loads one thousand (千) one kilogram weights (千) and decorates them with sun flowers (里) to celebrate the occasion.

要 = 女 + 覀 : Bessie Coleman shows Maud Younger how to use a knuckle duster in the aorta's bathroom. She says it's very important and that Maud will have to get one herself.