(prefix indicating ordinal number, e.g. first, number two etc) / order / (old) rank in the imperial examinations / mansion / (literary) but / just
第
=
⺮
+
弓
+
丨
+
丿
:
Dorothy Gale (di) accomplished an awesome result with her composite bow (弓) in the space station's bathroom (Ø4): She shot a bamboo stick (⺮) into a banana (丿) so it was split in half, and then fired a dinosaur bone (丨) into the bamboo stick (⺮) so it was split in half as well. Dorothy is number one (第) with the bow!
(prefix indicating ordinal number, as in 第六[di4 liu4] "sixth") / (literary) grades in which successful candidates in the imperial examinations were placed / (old) residence of a high official / (literary) but; however / (literary) only; just
二
=
一
:
Mnemonic symbol: a capacitor, because the two strokes remind me of the symbol in electrical drawings. Albert Einstein (Ø) is experimenting with a capacitor (二) in the space station's bathroom (Ø4). He finds that it's uncomfortable to discharge a capacitor using two flutes (一).
sound / voice / tone / noise / reputation / classifier for sounds
声
=
士
+
尸
+
丨
:
Sherlock Holmes (sh) hears the terrifying sound (声) of bone (丨) on stone in front of the engine ((e)ng1), and he's sure that there must be a ghost (尸). Indeed it's only the bachelor (士) who wants to scare Sherlock.