濁世

浊 = 氵 + 虫 : Julian Giant Squid (zhu) is drinking from a bottle of water (氵) in the observatory's kitchen (o2), but he finds that the water is very muddy (浊) because there are so many mosquitoes (虫) in the bottle.

世 = 廿 + L : Mnemonic symbol: the WTO or WHO.

Sherlock Holmes (sh) is cleaning a flower pot (廿) under the shower of the space station's bathroom (Ø4) with a loofah (L) because he didn't quite understand a poster next to the shower from the WHO (世) explaining dangers arising from different germs.

In this case, L is for loofah.