芦
=
艹
+
户
:
Lenny Lemur (lu) is growing reed (芦) just inside the space station's entrance (Ø2). His garden has a nice wooden swinging door (户) and the soil consists of shredded artificial lawn (艹).
cave / hole / zero (unambiguous spoken form when spelling out numbers) / CL:個|个[ge4]
洞
=
同
+
氵
:
Doggy Dog (du) finds two twins (同) have fallen down the cave (洞) in the engine's bathroom ((e)ng4). He immediately begins to dig a tunnel to bring them a bottle of water (氵) until more help arrives.