疾控中心

疾 = 疒 + 矢 : Joan of Arc (ji) got a colorful rash (疒) and dysentery (疾) on a trip outside of the space station. As soon as she re-entered the space station, she darts (矢) through the space station's entrance (Ø2) towards the restroom.

控 = 扌 + 空 : Karl Koala (ku) cannot find the air conditioner's (空) remote control (控) in the engine's bathroom ((e)ng4; he's sitting on it). He doesn't want to get up from the sofa either, so he switches the aircon on using a long toy claw (扌).

中 = 丨 + 口 : Mnemonic symbol: a dart board, because you always try to hit the center.

Julian Giant Squid (zhu-) is throwing dinosaur bones (丨) as darts on a dart board in front of the engine ((e)ng1). To make it a bit more difficult he's throwing mandarins (口) into the air as well and skewers them up right in the center (中 is a mandarin skewered on a dinosaur bone) in mid flight with the dinosaur bones. He's still able to consistently hit the center (中) of the dart board.

心 = 乚 + 丶 : Marie Curie (xi) uses a shovel (乚) to dig a hole in front of the encampment ((e)n1). She wants to bury her heart (心). To the side are three petal leaves (丶), with which she wants to cover it afterwards.