the unknown
collocation未知的事物；未知领域
Explorers have always been drawn to the unknown.
探险家们总是被未知领域所吸引。
未知的事物；未知情况
先理解核心含义，再看它在真实句子里的用法。
未知的事物；未知情况
Any thing, place, or situation about which nothing is known; an unknown fact or piece of information.
The young explorer felt both excitement and fear as she set off into the unknown.
这位年轻的探险家在出发进入未知领域时既感到兴奋又感到害怕。
一个变量(通常是x、y或z),其值需要被找到
A variable (usually x, y or z) whose value is to be found.
未知且未经探索的区域
an unknown and unexplored region
任何关于其一无所知的事物、地点或情况；未知的事实或信息
Any thing, place, or situation about which nothing is known; an unknown fact or piece of information.
不属于所处环境的任何人
anyone who does not belong in the environment in which they are found
After months of research, the cause of the strange noise remained an unknown.
经过数月的调查，那奇怪噪音的起因仍然是个未知数。
AI contextual example
In this math problem, you need to solve for the unknown.
在这个数学问题中，你需要求出未知数。
AI contextual example
they came like angels out the unknown
他们如天使般来自未知世界
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未知的事物；未知领域
Explorers have always been drawn to the unknown.
探险家们总是被未知领域所吸引。
对未知事物的恐惧
Many people feel anxiety because of their fear of the unknown.
许多人因为对未知事物的恐惧而感到焦虑。
走向未知；进入未知世界
The astronauts were about to fly into the unknown.
宇航员们即将飞入未知世界。
含有两个未知数的方程
In algebra class, we learned how to solve an equation with two unknowns.
在代数课上，我们学习了如何解含有两个未知数的方程。
一个完全陌生的人；无名小卒
To the talent agency, the young actor was a complete unknown.
在这家经纪公司看来，这位年轻演员完全是一个无名小卒。
巨大的未知；未知世界
The old sailor often spoke of death as the great unknown.
老水手常说死亡是一片巨大的未知。
未知的事物；未知的领域
Many explorers were driven by a desire to venture into the unknown.
许多探险家是被深入未知领域的渴望所驱使的。
未知数；难以捉摸的人或事
The new coach is still an unknown quantity, so we are not sure what to expect.
新教练仍是个未知数，所以我们不确定会发生什么。
陌生的领域；未知的局面
Moving to another country is unknown territory for me.
搬到另一个国家对我来说是陌生的领域。
已知的已知——有些事情我们知道我们知道。我们也知道存在已知的未知，也就是说，我们知道有些事情我们不知道。但还有未知的未知——那些我们不知道自己不知道的事情。
Former U.S. Secretary of Defense Donald Rumsfeld said this in 2002; it is widely quoted to explain uncertainty and the limits of knowledge.
美国前国防部长唐纳德·拉姆斯菲尔德在2002年说了这番话，后被广泛引用来说明不确定性和知识的局限。
进入未知！进入未知！
The refrain of the title song from Disney's animated film Frozen II (2019), sung by Elsa. It has become an iconic pop culture call to embrace the mysterious.
迪士尼动画电影《冰雪奇缘2》(2019)同名主题曲的副歌部分，由艾莎演唱。它已成为拥抱未知的经典流行文化表达。
Use unknown naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
拆成 un（不）+ known（知道）：不知道的事就是未知数。
语域：neutral 常见场景：数学解题：求未知数、书面语或新闻：泛指未知的人或情况、探险或文学：指未探索之地、未知领域、身份或背景不明：指没有身份或不属于某环境的人 作名词时通常出现在较正式或书面语境中，如数学题里“求未知数”，或泛指“未知的事物/情况”。日常口语更常用形容词加名词（如 something unknown）来替代。这里的“通常”“多用于”只是提示常见用法，并非绝对限制。
可数名词，复数形式为unknowns
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.