/ˈreɪʃiəʊ ||; ˈreʃɪˌo/noun [C] ratio (of A to B) the relation between two numbers which shows how much bigger one quantity is than another 比例；比率: The ratio of boys to girls in this class is three to one (= there are three times as many boys as girls). 这班上的男女生的比例是三比一。