Can anyone explain what are the apron taxiway and aircraft holding taxiway with an illustration, please?
Apron taxiways are just taxiways, except they are on the apron. They help planes on the apron connect to the main taxiways or the planes on the main taxiways connect to the apron.

I don't know what you meant by holding taxiways, but I assume you meant runway threshold or runway holding point. In that case, here's your illustration:



Notice how the apron taxiways are only on the apron and how they lead to the main taxiways! Also, the blue circled areas are runway holding points. 

Legend:
Yellow lines: Apron Taxiways;
Red line: Runway;
Blue circles: Runway holding points;
Orange lines: Main taxiways and high speed taxiway;

Oh, and the high speed taxiway I just mentioned is the slanted taxiway connecting the rwy and taxiway without a holding point. That would answer your Rapid Exit Taxiway question. 

Yes your terms are clear, but they are not the exact terms that we use in aviation. I guess that was why that guy said your terms weren't clear. But, I do understand them. It's just you wouldn't use them if you were an actual pilot.