Do you know much about mechanical things?  I surely don’t!  I wouldn’t know if something needed a hydraulic hose, for example, or not.  Now I do know a little about cars, not much, but a little bit.  If my husband is talking to me about something on our van, I would probably know what he was talking about.  I probably wouldn’t know how to fix it, though, because that’s his department!  But at least I’d have an idea what he was talking about.