硬
=
更
+
石
:
Maud Younger (y) finds the snake which ate too much (更) in the engine's bathroom ((e)ng4), and it feels miserable. To make the snake feel better Maud massages the snake using two warm stones (石). As Maud massages the snakebshe finds that the snake's belly is really hard (硬).
目
=
囗
+
二
:
Mnemonic symbol: the Eye of Providence (目).
Malte Monkey (mu-) is unpacking an enclosure (囗) full of capacitors (二). He's afraid that the Eye of Providence (目) will see him, so he does it secretly in the space station's bathroom (-Ø4).
mark / sign / label / to mark with a symbol, label, lettering etc / to bear (a brand name, registration number etc) / prize / award / bid / target / quota / (old) the topmost branches of a tree / visible symptom / classifier for military units
标
=
木
+
示
:
标 is a part of 标志, the word for "logo", like the one with the famous puma.
Brunhilde (bi) saved herself from a puma (标) by climbing on the Christmas tree (木) in front of the aorta (ao1). She tries to keep the puma form climbing the tree by fending it off with a guidon (示).