1.~ (to sb)未知的；不详的；未被确认的not known or identified
a species of insect previously unknown to science科学上以前尚未了解的一种昆虫
He was trying, for some unknown reason , to count the stars.不知何故，他试图数星星。
The man's identity remains unknown.这名男子的身份还是个谜。
2.不出名的；无名的not famous or well known
an unknown actor没有名气的演员
The author is virtually unknown outside Poland.在波兰以外，这位作者实际上鲜为人知。
3.从未发生的；从不存在的never happening or existing
The disease is as yet unknown in Europe(= there have been no cases there) .这种疾病至今尚未在欧洲出现过。
It was not unknown for people to have to wait several hours(= it happened sometimes) .人们得等几个小时的事时有发生。
Unknown to me, he had already signed the agreement.他背着我已签了协议。
Unknown to me, he had already signed the agreement.他背着我已签了协议。
1.[sing]未知的地方（或事物）places or things that are not known about
a journey into the unknown探险之旅
a fear of the unknown对未知事物的恐惧
2.[c]无名者；不出名的人a person who is not well known
A young unknown played the leading role.演主角的是一个名不见经传的年轻人。
3.[c]不明的情况；未知的因素a fact or an influence that is not known
There are so many unknowns in the proposal.这项提案中的未知数太多了。
4.[c]未知数；未知量a quantity that does not have a known value
X and Y in the equation are both unknowns.等式中的 X 和 Y 都是未知数。
Did she think about this unknown relative who would have first choice? Did she wonder what he would be like?
她会不会思忖那位不知名的亲属究竟是个怎麽样的人？
Kyle Katarn found Daye corrupted by the dark side of the Force by an unknown evil Force-user.
凯尔·卡塔恩发现一个不明身份的邪恶原力使用者利用原力黑暗面腐蚀了达耶。
He found a terran outpost that had been infested by unknown alien organisms.
他发现人类前哨站已遭到未知外星生物旳感染。
Read the parable on forgiveness below, author unknown, and see if it inspires you to forgive someone you've been harboring a grudge against.
阅读下面这篇关于宽容的寓言，作者不详，然后看一下这篇寓言是否能鼓励你宽恕曾经让你很反感的人。
And though it can be off-putting at times, it is essential that we know just how much remains unknown.
尽管这偶尔会很不愉快，但是我们毕竟了解到我们不清楚的还有多少。
Opportunity does not avail them; outcomes remain unmarked and the appropriate ends to which they might be working are unknown to them.
机会帮不到他们；结果仍是未知，他们也不知道自己应有何种结果。
The boat crew spoke no English and after an hour of bouncing around in a speedboat we ended up on an unknown island.
船员们不会讲英语，在一个小时的晃动乘快艇我们结束了在一个未知的岛屿。
The entombment in London attracted over one million people within a week to pay their respects at the unknown soldier's tomb.
伦敦冢在吸引无名战士墓超过百万人在一周内支付他们的敬意。
Of course he spoke with a conventional sense of duty only, for that sort of wondering had not been unknown to himself in bygone days.
当然，他说这话的时候，是出于一种习惯的责任感，因为在过去他自己也不是没有产生过这样的疑问。
Look it up in the dictionary, and you'll find news described as "a report of recent events or previously unknown information. "
字典对新闻的定义是“对于最近事件或先前未知资讯的报道”。
But there was a more real life for Hester Prynne, here, in New England, that in that unknown region where Pearl had found a home.
但对海丝特·白兰来说，住在新英格兰这里，比起珠儿建立了家园的陌生的异乡，生活更加真实。
The attenuation coefficient of each voxel is the product of its unknown density and a known energy-dependent mass attenuation coefficient.
在每个体素的衰减系数，是不知道其密度产品和知名能源依赖质量衰减系数。
The exact nature of this type of matter is unknown, but it seems to make up a quarter of the contents of the universe.
暗物质的具体本质还尚不为人所知，但它们着实占整个宇宙物质的四分之一。
It's important that it has a section broken, but how much is unknown.
主要是断了一截，还不知道断了多少呢。
Your Week Ahead: There's nothing wrong with a brave step into the great unknown, as long as you appreciate that this is what you are taking.
你朝着巨大的未知迈出勇敢的一步，只要你意识到自己在做什么，那就没什么不对。
The impact of the deep water deployment is definitely an unknown unknown, as it has not been used on anything like this scale before.
深海的处置措施施造成的影响显然是一个未知的未知，毕竟在此之前人们从没有处理过这么大规模的事故。
It's amazing how much fear of failure and fear of the unknown can hold us back.
对失败和未知的恐惧令我们犹豫不决，那股力量是非常惊人的。
The precise nature of dark matter is unknown and over the years many contenders have been put forward to account for it.
暗物质的本质一直不为人知，许多年来也有很多粒子理论被提出，以视图对其进行解释。
But the huge advantage of the multiple dispatch style is in the seamlessness with which you can combine shapes of unknown types.
但是多分派样式的巨大优势在于您可以用它来无缝地合并未知类型的形状。
Further, it is unknown how much the Earth will dampen temperature increases.
进一步讲，我们根本不知道地球还会上升多少度。
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