(1) An "infinite set" is consisted by a kind of "infinite elements (infinite carriers)" ------- there will be no "infinite set" without "infinite carriers".
(2) The unique characteristics (special properties, special existing conditions, special form of expression and the special relationship between and among each other) of each kind of “infinite carriers (infinite elements)” constitute each "unique infinite set"-------- there will be no variety of different infinite sets without "different kinds of special infinite elements ('infinite carriers' with unique characteristics)".