Sentence:  To such as know that it is impossible to <WSD>denumerate</WSD> the points of a continuum, that is, to set up a one-to-one correspondence between, say, the points of a unit-line and the integers, Zermelo's result is apt to be surprising, ... 
Meaning of the word marked with <WSD> tags:  To assign a bijection from a denumerable set to the natural numbers.