Is TRC20 and TRX the same?

I'm rather curious about the relationship between TRC20 and TRX. Could you please clarify if they are essentially the same thing? I've heard some discussions about them but the details are still fuzzy to me. TRX, as I understand, is the native token of the Tron blockchain, but what exactly is TRC20? Is it another token or a standard? And if they're not the same, how do they interact or differ from each other? Your expert insight would be greatly appreciated.