源于

root

1. 莱茵河发源于何处？
   Where is the source of the Rhine?
2. 衍生物来源于特别的出处或由一特别的来源分支衍生而来的物体
   Something that branches out or derives its existence or origin from a particular source.
3. 我相信那句话是源于你昨天所说的。
   I believe that remark originated from what you said yesterday.
4. 它起源于遥远的中世纪。
   It has its roots deep in the Middle Ages.
5. 这种建筑风格起源于古希腊。
   The style of architecture originated from the ancient Greeks.

于的英语翻译：