一年又一年
yī​nián​yòu​yī​nián

year after year

  1. 一 yī numeral
    one
    one; the number 1; single; alone
  2. 年 nián noun
    year
    a year or the duration of a year; also used to describe annual or yearly occurrences
  3. 又 yòu adverb
    again
    (once) again; indicates the recurrence or continuation of an action or state (often of a negative or undesirable nature)
  4. 一 yī numeral
    one
    one; the number 1; single; alone
  5. 年 nián noun
    year
    a year or the duration of a year; also used to describe annual or yearly occurrences