1
- a place, person, or thing from which something comes or can be obtained来源：
mackerel is a good source of fish oil.
鲭是一种很好的鱼油来源。
1.1
- a spring or fountain head from which a river or stream issues（河流或小溪的）源头：
the source of the Nile.
尼罗河的源头。
1.2
- a person who provides information提供信息的人：
military sources announced a reduction in strategic nuclear weapons.
军方消息人士宣布减少战略核武器。
1.3
- a book or document used to provide evidence in research出处, 原始资料。
1.4
- technical a body or process by which energy or a particular component enters a system〈技〉源。SINK2的反义词。
1.5
- Electronics a part of a field-effect transistor from which carriers flow into the interelectrode channel【电子】源极; 电源。
with obj.(常作be sourced)
1- obtain from a particular source从特定来源获得：
each type of coffee is sourced from one country.
每一种咖啡都来自某一个国家。
1.1
- find out where (something) can be obtained找出…的来源：
she was called upon to source a supply of carpet.
她被要求寻找地毯供应的来源。
短语
at source
1
- at the point of origin or issue在源头：
reduction of pollution at source.
在源头上减少污染。
1.1
- used to show that a sum is deducted from earnings or other payments before they are made（从工资或其他付款中）直接扣除：
your pension contribution will be deducted at source.
你的养老金部分将被直接扣除。
词源
late Middle English: from Old French sours(e), past participle of sourdre 'to rise', from Latin surgere.