source可以与以下词性连用
动词，如：take its source at 发源于…；discover the source 发现…的源头
形容词，如：historical sources 史料；power sources 能源
介词，如：from all sources 从各个方面；trace to its source 追根寻源
source例句分享
Practical experience is the source of all scientific knowledge.
实践是一切科学知识的根源。
We pursued the river to its source.
我们沿着这条河走到了源头。
The library has quantities of reference sources.
该图书馆藏有大量可供参考的原始资料。
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