找到这场冲突的根源对于持久和平至关重要。

Finding ___the ___root ___of this conflict is essential for lasting peace.

贪婪常被认为是许多社会问题的根源。

Greed is often considered ___the ___root ___of many societal problems.

调查旨在找出此次安全漏洞的根本原因。

The investigation aims to uncover ___the ___root ___of the security breach.