سالهای

In a sentence

• سالهای گذشته انسانها زندگی ساده‌تری داشتند.

  In past years, people led a simpler life.

  The word "سالهای" is used in conjunction with the word "گذشته" to signify the possession or association of "years" with "past".

• در سالهای اولیهٔ زندگی، یادگیری زبان بسیار سریع است.

  In the early years of life, language learning is very fast.

  Here, "سالهای" indicates the possession of "years" with "early life" as part of an adverbial phrase.

• سالهای دوستی ما همیشه در خاطر من است.

  The years of our friendship are always in my memory.

  In this case, "سالهای" conveys the concept of years specifically associated with the friendship.