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IELTS BNC: 633 COCA: 597
sourcenoun [ C ]uk/sɔːs/ us/sɔːrs/

B2 the place something comes from or starts at, or the cause of something来源，出处；发源地；起源，根源

a source of heat/energy/light热源／能源／光源
a heat/energy/light source热源／能源／光源
Oranges are a good source of vitamin C.橙子富含维生素C。
Experts are trying to track down the source of the contamination in the water supply.专家们正试图找到水源中污染物的来源。
We walked up the river to its source in the hills.我们沿河上溯而行，一直走到其在山中的源头。
Money is often a source of tension and disagreements in young married couples.金钱往往是年轻夫妇关系紧张不和的起因。

C1 someone or something that supplies information信息来源

The journalist refused to reveal her sources (= say who had given the information to her).记者拒绝透露消息的来源。
According to government sources (= people in the government) many MPs are worried about this issue.政府方面透露，很多下议院议员对这个问题表示担忧。
According to congressional sources (= people who work in Congress) many Representatives are worried about this issue.国会方面透露，很多众议员对这个问题表示担忧。
Always acknowledge your sources (= say which books you have used) at the end of a paper.论文的末尾务必列出参考书目。
at source

at the place where something comes from在源头，从一开始

Tax is deducted from my income at source.我的工资还没拿到手就扣去了税金。

More examples

The opera house is a great source of civic pride.

His main source of work had dried up, leaving him short of money.

Some alluvial deposits are a rich source of diamonds.

Engineers are endeavouring to locate the source of the problem.

He's established himself as a dependable source of information.

sourceverb [ T often passive ]uk/sɔːs/ us/sɔːrs/

to get something from a particular place从（某地）获取

Where possible the produce used in our restaurant is sourced locally.我们餐厅尽可能用当地出产的农产品。
IELTS BNC: 633 COCA: 597
source

noun¹

 1where you get sth from出處ADJECTIVE | VERB + SOURCE | PREPOSITION | PHRASES ADJECTIVE➤excellent, fertile, good, great, lucrative, reliable, rich, valuable絕好的來源；豐富的源泉；不錯的來源；賺錢的渠道；可靠的來源；寶貴的源泉◇a fertile source of ideas豐富的思想源泉◇a lucrative source of income頗為豐厚的收入來源◇a rich source of vitamins豐富的維生素源➤important, large, main, major, principal重要來源；主要來源▸➤cheap廉價來源◇a cheap source of protein蛋白質的廉價來源➤external, foreign, outside外部來源◇Do you have any foreign sources of income?你有外部的收入來源嗎？➤independent獨立來源◇an independent source of funding獨立的資金來源➤only, single唯一來源◇The only source of light was the fire.唯一的光源就是火。➤additional, alternative, different, new, other額外的來源；其他可選的來源；不同的來源；新的來源；其他的來源◇We need to look for alternative sources of energy.我們需要尋找其他可替代能源。◇to develop new sources of revenue開發新的收入來源➤same相同的來源➤likely, potential可能的／潛在的來源◇a potential source of conflict引發衝突的潛在因素➤unexpected出乎意料的來源➤constant持續的來源◇a constant source of irritation一直以來令人惱火的原因➤natural自然資源▸➤renewable, sustainable可再生／可持續資源◇The town obtains all its energy from renewable sources.這座城市的所有能源都是可再生的。➤energy, food, fuel, heat, light, power, protein, water能源；食物源；燃料來源；熱源；光源；電源；蛋白質源；水源➤funding, revenue資金／收入來源VERB + SOURCE➤be, constitute, prove, provide是來源；構成來源；證明是來源；提供來源◇The census constitutes the principal source of official statistics.人口普查是官方統計數字的主要來源。◇These crustaceans provide a valuable food source for some fish.這些甲殼動物是某些魚類重要的食物來源。➤exploit, tap, tap into, use (as)開源；使用（⋯作為）來源◇The government hopes to tap new sources of employment in the area of health.政府希望在衞生領域開拓新的就業崗位。➤find, identify, locate找到來源；確定來源◇We tried to locate the source of the sound.我們試圖查明聲音是從哪兒發出來的。PREPOSITION➤at source (BrE) 在源頭◇Is your salary taxed at source (= by your employer)?你拿到的是稅後薪水嗎？➤source of⋯的來源◇a source of income / revenue收入／稅收來源◇a source of inspiration / strength靈感的／力量的源泉◇a source of energy / food / light能源；食物源；光源PHRASES➤a variety of sources各種來源◇The research was funded from a wide variety of sources.這項研究的資金源自各方。
source

noun²

 2person, book, etc. that gives information提供信息的人或書ADJECTIVE | VERB + SOURCE | SOURCE + VERB | SOURCE + NOUN | PREPOSITION | PHRASES ADJECTIVE➤invaluable, useful, valuable寶貴的資料來源；有用的資料來源▸➤authoritative, informed, reliable, reputable權威的消息來源；消息靈通人士；可靠的消息來源▸➤unreliable不可靠的消息來源▸➤original原始的資料來源▸➤independent獨立的消息來源▸➤anonymous, confidential, unnamed匿名的／秘密的／無名的消息來源◇his refusal to reveal the identity of a confidential source他拒絕透露秘密消息提供者的身分➤primary, secondary原始／二手資料➤multiple, several, various多種／幾種／不同來源◇The evidence is corroborated by multiple sources.多種消息源都證實了這一證據。➤published出版的資料▸➤biographical, documentary, historical, literary, written傳記／文件／歷史／文學／文字資料➤media, news媒體／新聞資料▸➤diplomatic, government, intelligence, military, official, police外交界／政府／情報部門／軍方／官方／警方消息人士◇Intelligence sources report a build-up of troops just inside the border.來自情報部門的消息報告說緊挨邊境內側有軍隊在集結。➤data, information數據／信息資料VERB + SOURCE➤use (as)使用（⋯作為）資料▸➤cite, quote引用資料◇Researchers try to quote primary sources wherever possible.研究人員盡可能地引用原始資料。➤disclose, identify, name, reveal透露消息來源；指出消息來源；說出消息來源◇The police refused to reveal the source of their information.警方拒絕透露信息的來源。➤protect保護消息來源SOURCE + VERB➤claim sth, describe sth, disclose sth, indicate sth, report sth, reveal sth, say sth, suggest sth, tell sb sth消息人士聲稱⋯／描述⋯／透露⋯／表示⋯／報告⋯／披露⋯／說道⋯／暗示⋯／告訴某人⋯◇Government sources indicated that a compromise might be reached.政府內的消息人士表示有可能達成和解。◇One source said: 'We are angry at the way we have been treated.'一位消息人士說道：“我們對受到這樣的對待感到憤怒。”➤deny sth消息人士否認⋯SOURCE + NOUN➤material原始資料PREPOSITION➤according to sources根據消息來源◇According to informed sources, a takeover bid is planned for next month.據消息靈通人士透露，計劃下個月會採取收購行動。➤source of⋯的資料來源◇The press room was a valuable source of information for journalists.新聞中心是記者們獲取信息的重要來源。◇Do you know the source of this rumour / rumor?你知道這個傳聞是從哪兒來的嗎？PHRASES➤sources close to sb與某人關係密切的消息人士◇Sources close to the player claim he won't be entering this year's championship.與該選手關係密切的消息人士稱他不會參加今年的錦標賽。
IELTS BNC: 633 COCA: 597
source

noun

source ♦︎ cause ♦︎ origin ♦︎ root ♦︎ starting point ♦︎ beginningsThese are all words for the point that sth starts from. 这些词均表示来源、起源、起因。PATTERNS AND COLLOCATIONS 句型和搭配◆(a) common source / cause / origin / roots / starting point◆a possible / natural source / cause / origin / starting point◆the real source / cause / origin / roots / beginnings◆the true / obscure source / cause / origin / beginnings◆a / an known / unknown source / cause / origin◆to have a source / a cause / origins / roots / a starting point / beginnings◆to identify the source / cause / origin / starting point / beginnings of sth◆to find the source / cause / origin / root / starting point of sth◆to locate / discover / investigate / trace the source / cause / origin / roots of sth■ source [countable] a place, person or thing that you get sth from 来源；出处◆We need to obtain more energy from renewable sources.我们需要从可再生资源中获取更多能源。◆Your local library will be a useful source of information.你们当地的图书馆将是很好的资料来源。◆The tiny window was the only source of light.那扇小窗户是唯一的光源。■ cause [countable] the thing or person that makes sth happen 原因；起因◆Unemployment is a major cause of poverty.失业是贫困的主要原因。◆There was discussion about the fire and its likely cause.对那场火灾及其可能的起因有过讨论。◆He died of natural causes.他是自然死亡的。  see also cause ⇨ cause verb ■ origin [countable, uncountable] ( origins [plural]) (especially written) the point from which sth starts; the first or early ideas, signs or stages of sth 起源；源头；原始阶段◆The origin of the word remains obscure.该词的来源尚不清楚。◆Most coughs are viral in origin (= caused by a virus).咳嗽大多是由病毒引发的。◆Bottles are labelled by country of origin.那些瓶子上贴有原产国标签。◆The TV series examines the origins of life on earth.这个电视系列节目探究地球上生命的起源。◆This particular custom has its origins in Wales.这种特殊风俗起源于威尔士。■ root [countable] (especially written) the main cause of sth, such as a problem or difficult situation; the origin or basis of sth （问题、困境等的）根源；起源；根基◆We have to get to the root of the problem.我们必须找到问题的根源。◆What lies at the root of his troubles is a sense of insecurity.他的一切忧虑源于一种不安全感。◆What would you say was the root cause of the problem?你认为问题的根本原因是什么？◆The two languages share a common root.这两种语言同源。◆Flamenco has its roots in Arabic music.弗拉门科舞曲起源于阿拉伯音乐。NOTE 辨析 Origins or root?In some cases you can use either word. 在有些情况下这两个词可以通用◆The custom has its origins / roots in Wales.这种风俗起源于威尔士。Both words can mean 'cause' but in slightly different ways: use root to talk about the cause of a problem. 二者都可表示原因、起因，但用法稍有区别。root指问题的起因◆We have to get to the origin of the problem. Use origin to talk about when, where and how sth started. * origin指某事在何时、何地及如何开始◆the origin of life / species / the universe生命／物种／宇宙的起源◆the roots of life/species/the universe The word roots can often suggest an emotional or cultural attachment; the word origins is more scientific. It is usual to talk about sb's social origins (= the social class they came from and the jobs their parents did) but their cultural roots (= the beliefs and customs of people in the family or place that they came from). * roots常有感情或文化色彩，origins则更具科学性。通常说某人的social origins（社会出身），但说他们的cultural roots（文化根源）。   see also origin , roots ⇨ family 3 ■ ˈstarting point [countable] a thing, idea or set of facts that can be used to begin a discussion or process （讨论或过程的）起点，基础◆The TV documentary served as a useful starting point for our discussion.这部电视纪录片成了我们讨论的有益起点。◆They reached the same conclusion from different starting points.他们的结论殊途同归。ⓘ Starting point is often used after positive adjectives such as convenient, good, suitable and useful. * starting point常用在有积极意义的形容词后面，如convenient、good、suitable和useful。■ beginnings [plural] (especially written) the first or early ideas, signs or stages of sth 原始构想；初始阶段◆Did democracy have its beginnings in ancient Greece?民主制度创始于古希腊吗？◆From these small beginnings it grew into the vast company we know today.这公司从这些小本生意起步，发展成为我们今天所知道的大公司。ⓘ Beginnings is usually used in the phrase sth had its beginnings in... or to describe how sth has changed from beginnings that were humble, modest, simple or small. * beginnings通常用在短语sth had its beginnings in ...中，或用humble、modest、simple或small修饰，表示事物如何发展起来。
IELTS BNC: 633 COCA: 597

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