专
=
二
+
㇉
+
㇏
:
Let's say the expert is a scientist. Also, 专 reminds me a little bit of the wheelchair symbol. Thus I choose a scientist in a wheelchair as symbol for 专.
专
=
二
+
㇉
+
㇏
:
In front of the anthill, the scientist and Julian Giant Squid are focused on one thing: Electrifying the wheelchair of the scientist. Deeply concentrated they connect a capacitor to the wheelchair, which indeed starts to move a little.
category / genus (taxonomy) / family members / dependents / to belong to / subordinate to / affiliated with / be born in the year of (one of the 12 animals) / to be / to prove to be / to constitute
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.