不惜血本

不 = 丆 + 卜 : Bruno Bear (bu) is setting up a wind wheel (丆) with a voodoo staff (卜) in the space station's bathroom (Ø4). He also puts a "forbidden" sign (mnemonic symbol for 不) on it, to make clear that it may not (不) be stopped.

惜 = 忄 + 昔 : NASA ordered Marie Curie (xi) to do an experiment for them in front of the space station (Ø1). They are spending 2000000000 bucks to see what happens when you crush a milk shake (昔) with a flail (忄) in outer space. Marie Curie thinks it is a pity (惜) and would rather drink her cherished (惜) milk shake rather than crush it.

血 = 丶 + 皿 : Mnemonic symbol: blood transfusion.

Xu Xian hurt himself and needs to get a blood transfusion in the elevator's bathroom. He found a petal leaf as donor, which is bleeding droplets into a bowl; Xu Xian gets the blood from the bowl as infusion using some tubes.

本 = 一 + 木 : Beelzebub (b) finds a Christmas tree (木) in the encampment ((e)n3) and feels like eating its roots (本). He uses a flute (一) to chop the roots right off.