source

/sɔrs/

the place where something begins, where it springs into being

中文释义：来源；源头；出处

The river's source is a small spring in the mountains.

这条河的源头是山中的一个小泉眼。

We need to find a reliable source of information for our research.

我们需要为研究找到可靠的信息来源。