1
be an oligarch
oligarch 是可数名词，单数形式前通常加冠词 an。
He was an oligarch.
他是一位寡头。
寡头；寡头统治者
oligarchs — plural of oligarch
先理解核心含义，再看它在真实句子里的用法。
寡头；寡头统治者
one of the rulers in an oligarchy
He was an oligarch.
他是一位寡头。
寡头政治的成员；参与统治国家的少数集团中的一员。
A member of an oligarchy; someone who is part of a small group that runs a country.
寡头政治中的统治者之一
one of the rulers in an oligarchy
拥有政治权力的非常富有的企业家。
A very wealthy business owner who wields political power.
寡头吸积过程中形成的原行星。
A protoplanet formed during oligarchic accretion.
The oligarch controlled most of the country's media outlets.
这位寡头控制了该国大部分媒体机构。
Several oligarchs met secretly to decide the new economic policy.
几位寡头秘密会面，以决定新的经济政策。
People protested against the oligarch who had grown rich from state assets.
人们抗议那个靠国有资产致富的寡头。
oligarch 是可数名词，单数形式前通常加冠词 an。
He was an oligarch.
他是一位寡头。
one of 后面接名词复数，表示“...之一”。
She is one of the oligarchs.
她是寡头之一。
Not this
He is oligarch in that company.
Use this
He is an oligarch in that company.
oligarch 是可数名词单数，单独作表语时必须带冠词 an；汉语没有冠词，所以容易漏掉。加上 an 才符合英语可数名词单数不能裸用的规则。
Not this
The oligarchs has too much power in that country.
Use this
The oligarchs have too much power in that country.
主语 oligarchs 是复数，谓语动词要用复数形式 have；汉语动词没有单复数变化，容易把 has 误用于复数主语。
Not this
The oligarchs rule the country, so it is an oligarch.
Use this
The oligarchs rule the country, so it is an oligarchy.
oligarch 指“寡头统治者”（人），oligarchy 指“寡头政治/寡头政体”（制度）。这里表示国家是寡头制国家，应使用 oligarchy。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
俄罗斯寡头
A Russian oligarch financed the political campaign.
一位俄罗斯寡头资助了这场政治运动。
亿万富翁寡头
The billionaire oligarch controls a large network of assets.
这位亿万富翁寡头控制着一个庞大的资产网络。
寡头财富
The city's property market is driven by oligarch wealth.
这座城市的房地产市场由寡头财富推动。
寡头权力
The country's democracy is threatened by oligarch power.
该国的民主受到寡头权力的威胁。
寡头控制的媒体
Oligarch-controlled media often shape public opinion.
寡头控制的媒体常常塑造公众舆论。
Use oligarchs naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
看到 olig 想到 oligopoly（寡头垄断），看到 arch 想到 monarch（君主）；少数统治者=寡头，想象几个大佬在拱门（arch）下密谋。
语域：formal 常见场景：政治报道、历史讨论、经济新闻 该词多用于正式或书面语境，比较常见于政治、历史和经济报道中；日常口语中较少使用。
hierarch、matriarch、patriarch 的 -arch 与 oligarch 一样读 /ɑːrk/，押韵；但 monarch 的 -arch 常读 /ərk/，而 arch（拱门）与 march（行进）的 ch 读 /tʃ/，注意区分。
Dictionary facts from ECDICT, WIKTIONARY.