苦功

苦 = 艹 + 古 : Karl Koala decided to repent for his sins and retreated into a cloister inside the space station. There he leads a very simple life full of hardship, e.g. he gave up on eucalyptus and just eats very bitter artificial lawn.

功 = 力 + 工 : Gitta Giraffe (gu) practices her Kung Fu skills (功) in front of the engine ((e)ng1) with a sparring robot made out of steel beams (工). The robot is programmed to fight Kung Fu (功), but Gitta Giraffe's Kung Fu is better: she hits the robots power button (力) and turns it off.