source可数。source可作名词和及物动词两种词性，作为名词时，是可数名词，含义为“来源”、“信息来源”、“起源”、“原因”，复数形式为sources；作为及物动词时，含义为“从……获得”。
source的中文含义及用法介绍
1、作为名词时，意为来源;出处;信息来源;原始资料;起源;根源;原因。
例句：Your local library will be a useful source of information.
你们当地的图书馆就是很好的资料来源。
He refused to name his sources.
他拒绝说出消息的来源。
Military sources say the boat was heading south at high speed...
军方称这艘船当时正高速向南行进。
This gave me a clue as to the source of the problem.
这件事给我提供了找出问题根源的线索。
Tourism is a major source of income for the area.
旅游业是这个地区的主要收入来源。
Don't believe what you are told; double-check with an independent source.
别相信别人告诉你的话，用独立的信息来源再核实一遍。
A fact documented by two contemporary sources.
由两份同期原始资料所证明的事实。
The study of the sources and development of words.
字词起源与发展的研究。
What are the greatest sources of conflict in the Middle East?
中东冲突的最重要原因是什么？
2、作为及物我动词时，意为(从…)获得。
例句：We source all the meat sold in our stores from British farms.
我们商店里卖的肉均从英国农场购进。
Together they travel the world, sourcing clothes for the small, privately owned company...
他们一道走遍世界各地，为那家私营小公司寻觅服装货源。
Whether from legal or illegal sources, income is taxable.
不管是从合法的还是非法的途径获得的，有收入就应当交税。
They sourced the materials from our company.
他们的材料是从我们公司获得的。
