y

剑桥词典

used to represent the second of two numbers or names that are not known or stated , when the first is represented by "x"
未知（或未指明）的数（或名称）（在两个未知或未指明的数或名称中，当第一个用x代替时，y用来代替第二个）
If 2x = 3y and x = 6, then y = 4. 假设2x=3y且x=6，则y=4。
The children on trial were referred to as child X and child Y. 受试儿童被称作儿童X和儿童Y。 返回 y