1
be unknown to {someone}
The cause of the fire remains unknown to investigators.
火灾原因对调查人员而言仍未知。
未知的；陌生的；从未见过的
先理解核心含义，再看它在真实句子里的用法。
未知的；陌生的；从未见过的
not previously known or experienced
The cause of the fire remains unknown to investigators.
火灾原因对调查人员而言仍未知。
来源不明的,未知的
being or having an unknown or unnamed source
不出名的或不为人所称道的
not famous or acclaimed
以前不知道的
not known before
The cause of the fire remains unknown.
火灾的原因仍然未知。
I got a call from an unknown number.
我接到了一个陌生号码的来电。
The writer's identity is still unknown to the public.
这位作家的身份对公众来说仍然未知。
The cause of the fire remains unknown to investigators.
火灾原因对调查人员而言仍未知。
此结构表示状态持续。
His whereabouts remain unknown.
他的下落仍然未知。
用作定语修饰名词。
The result depends on an unknown factor.
结果取决于一个未知因素。
Not this
He is unknown of the news.
Use this
He is unaware of the news.
形容词 unknown 用于描述事物本身未知，不用于表示某人不知道某事。表示某人不知道某事应使用 unaware of 或 don't know。
Not this
The reason is unknown for us.
Use this
The reason is unknown to us.
unknown 表示“对某人未知”时，固定搭配介词 to，而非 for。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
不为…所知的
The details of the plan were unknown to the public.
该计划的细节不为公众所知。
未知数；难以预测的人或事
The new player is an unknown quantity on the team.
这名新球员是队里的一个未知数。
相对不知名的
He was a relatively unknown artist until his exhibition became a success.
直到他的展览取得成功，他都是一个相对不知名的艺术家。
未知原因
The fire was declared to be from an unknown cause.
火灾被宣布为原因不明。
未知领域
The company is moving into unknown territory with its new product.
这家公司正带着新产品进入未知领域。
未知数
The new manager is still an unknown quantity.
新经理还是个未知数。
进入未知领域
They set off into the unknown.
他们出发进入了未知领域。
未知领域
For me, investing in stocks is unknown territory.
对我来说，投资股票是未知领域。
存在已知的未知和未知的未知。
The phrase 'unknown unknowns' is frequently quoted in popular media.
短语'未知的未知'在流行媒体中被频繁引用。
我就是未知！
In the silent film 'The Unknown', Lon Chaney plays an armless knife-thrower known as 'The Unknown'.
在默片《未知者》中，朗·钱尼扮演了一个被称为'未知者'的无臂飞刀手。
Use unknown naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
“un-”表示“不”，“known”是“已知”，合起来就是“未知”。想象一个陌生人，你对他“一无所知”（unknown）。
该词为中性，常见于各种正式或非正式场合，表示未知或不被知晓的状态。
通常后接介词to表示‘不为某人或某物所知’
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.