空
=
工
+
穴
:
In front of the engine, Karl Koala found some very special cave paintings. Using steel beams he constructs a protective cover. He also installs air conditioning to make the best environment possible to preserve the cave paintings.
difficult (to...) / problem / difficulty / difficult / not good
难
=
又
+
隹
:
Mnemonic symbol: a video game which is almost impossible to beat.
难
=
又
+
隹
:
Just inside the anthill's kitchen, Napoleon and a sparrow are trying to beat an insanely difficult video game. After playing and failing all day long Napoleon finally loses his temper and crashes the game wearing two boxing gloves.