金属外壳

金 = 丷 + 全 : Mnemonic symbol: a bar of gold.

金 = 丷 + 全 : In front of the encampment, Joan of Arc is on the lookout for smugglers. Indeed she catches the mean crocodile smuggling gold bars hidden in whole wheat breads.

金 = 丷 + 全 : Mnemonic symbol: a bar of gold.

金 = 丷 + 全 : In front of the encampment, Joan of Arc is on the lookout for smugglers. Indeed she catches the mean crocodile smuggling gold bars hidden in whole wheat breads.

属 = 尸 + 禹 : 暴龙属 is the genus Tyrannosaurus, and I'll use a T-Rex as mnemonic symbol.

The great Yu (禹) built a dyke to prevent Sheldon Shrimp (shu) from entering his side of the space station (Ø3), but then a T-Rex (属) ghost (尸) starts to haunt him until he tears down his dyke.

外 = 夕 + 卜 : There's a hole in the wall of the airplane's bathroom (ai4), and from outside (外), a bat (夕) wants to enter. Willy Walrus (w) is very afraid of bats, so he does his best to hinder the bat from entering with a voodoo staff (卜).

壳 = 冗 + 士 : The Queen of Hearts (qi) is dating the bachelor (士) in the aorta's bathroom (ao4). The bachelor tries to impress the Queen of Hearts and inhaled a lot of helium (冗), but instead of sounding funny he is just squealing so much that the Queen of Hearts hides under her carapace (壳).