Learn Farsi: بیست سال است که این پیوند وجود دارد.

This is the core rule of the [Time] + است که structure. In English, we use the present perfect ('has existed') for something that started in the past and continues today. In Farsi, because the bond still exists right now, we use the present tense دارد combined with the time expression to show the ongoing duration.

What is the literal translation of وجود دارد?

It literally means 'it has existence.' وجود means 'existence' or 'presence,' and دارد means 'it has.' Together, this compound verb is the standard Farsi way to say 'exists' or 'there is.'

Would native speakers actually say است in everyday conversation?

In formal writing and careful speech, yes. However, in casual, everyday conversation, native speakers almost always contract است onto the previous word. So بیست سال است که becomes بیست ساله که.

What does پیوند mean in other contexts?

Beyond meaning 'bond' or 'connection' between people or ideas, پیوند is also used for a 'link' (like a hyperlink on the internet) or a 'transplant' in medicine.