[TOP]Y(plural Y's or Ys) (also y (plural y's)) [waɪ] noun countable » the 25th letter of the English alphabet 英语字母表的第25个字母 [TOP]y(also Y) [waɪ] noun uncountable » used to represent the second of two numbers or names which are not known or stated when the first is represented by 'x' ﹝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﹞未知﹝或未指明﹞的数﹝或名称﹞ 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。 [TOP]Y
1.N-VAR 可变名词 英语字母表的第25个字母Y is the twenty-fifth letter of the English alphabet.
2.N-SING 单数名词 基督教青年会（或女青年会）旅馆 A YMCA or YWCA hostel is sometimes referred to as the Y .