正模标本

正 = 一 + 止 : Mnemonic symbol: a stick-figure with straight lines. James II of England (zh) really has to use the engine's bathroom ((e)ng4), but there's a stick-figure (正) blocking the stalls with a barrier (止). The stick-figure measures with a flute (一) whether James is tall enough to go. James stands very straight (正) to make himself as tall as possible.

模 = 木 + 莫 : Mahatma Gandhi (m) and Mozart (莫) both want to impress a super model (模) in the observatory's kitchen (o2). They both set up beautiful Christmas trees (木) to impress the super model with their decoration skills.

模 = 木 + 莫 : Just inside the space station's entrance (Ø2) Mozart (莫) and Malte Monkey (mu) create a duplicate of a Christmas tree (木) using lots of silicon and a mold (模).

标 = 木 + 示 : 标 is a part of 标志, the word for "logo", like the one with the famous puma.

本 = 一 + 木 : Beelzebub (b) finds a Christmas tree (木) in the encampment ((e)n3) and feels like eating its roots (本). He uses a flute (一) to chop the roots right off.