The motive for the killing is unknown.
杀人的动机不明。
The immediate cause of death is unknown.
造成死亡的直接原因不明。
Ignorance of people brings fear, fear of the unknown.
人的无知带来了恐惧，对未知事物的恐惧。
Silently, he let himself go into the unknown.
他默默地走进未知的世界。
His whereabouts have been utterly unknown so far.
迄今他的下落全然未知。
I remember the fear and the panic of the unknown.
我记得那种对未知的恐慌感。
Why this pigment is there and what it might do was unknown.
这种色素为什么会存在和它可能有什么作用是未知的。
This spaceship is about to start an exciting voyage into an unknown world.
这艘宇宙飞船即将开始一趟振奋人心的未知世界之旅。
A little bravery can result in the possibility of success when confronted with something unknown.
当面对一些未知的事情时，拿出一点勇气就有可能带来成功。
What led one ichthyosaur to bite another on the snout is unknown.
是什么驱使一只鱼龙咬另一个鱼龙的鼻口部仍未可知。
他是个没有名气的作家。
The man's identity remains unknown.
这名男子的身份还是个谜。
The fate of the three men is unknown.
这三个人命运未卜。
The author is virtually unknown outside Poland.
在波兰以外，这位作者实际上鲜为人知。
The contract was awarded to a previously unknown company.
该合同给了一家先前不知名的公司。
He was trying, for some unknown reason , to count the stars.
不知何故，他试图数星星。
This truck is of unknown origin.
这辆卡车来历不明。
It is still unknown how the universe came into existence.
人们仍然不知道宇宙是如何形成的。
He is saved by a warthog and another small unknown animal.
他被一只疣猪和另外一只不知名的小动物救了。
When most of us get a text message on our cell phone from an unknown person, we usually say "sorry, wrong number!"
当我们收到陌生人的短信时,我们通常会说：“对不起, 你发错了！”
The authorship of the poem is unknown.
这首诗的作者不详。
A young unknown played the leading role.
演主角的是一个名不见经传的年轻人。
What she wants is unknown, but she always comes back.
她想要什么不得而知，但她总会回来的。
Thanks to the automobile, Americans soon had a freedom of movement previously unknown.
由于有了汽车，美国人很快就获得了前所未有的行动自由。
Some parts of Shakespeare's life will always remain unknown.
莎士比亚一生中的某些部分永远不会为人所知。
地址未详。
The date of birth and death of Qu Yuan is unknown.
屈原的生卒年月不详。
The exact way they affect the carbapenemases is currently unknown.
它们影响碳青霉烯酶的确切方式目前尚不清楚。
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