thirteen-eight,138 （在描述某种事物的数目时可以这么读）thirty-eight ,38（有连词符号的可做定语，用于名词前）thirty eight, 38thirty eighty 3880（在描述某种事物的数目时可以这么读）
thirteen-eight 138thirty-eight 308做修饰语thirty eight 308thirty eighty 3080
