Books made of papyrus were unknown to the Mesopotamians.

人们在美索不达米亚不曾发现过莎草纸书。

The ordinary feelings which make life amiable and indolent, were unknown to him.

赋予生命以和蔼和懒惰这些特质的正常情感，他无从知晓。

There is unknown to us is an alien would be.

我们不知道外星人会是什么样子。

There's a lot that happens here that's unknown to the outside world.

那里发生了很多外界不知道的事。

Polo told of many amazing things that were unknown to Europe, such as paper money.

马可·波罗讲到的许多神奇的东西在欧洲是闻所未闻的，如：纸币。

The species was unknown to science until the late 1950s and has not been studied closely.

该物种直到20世纪50年代末才为科学界所知，也没有得到仔细的研究。

Each time scientists visit these volcanic worlds, over half the animals they find are unknown to science.

科学家们每次来探访这些火山世界时，都会发现在找到的动物中，有超过半数的动物是未知的。

Mrs. Yeobright had never before been to her son's house, and its exact position was unknown to her.

约布赖特太太从来没去过她儿子家，不知道屋子的确切位置。

Yes. It was brave of him to go to a place that was unknown to humans at that time.

是的。他很勇敢，到一个当时人类未知的地方去。

The names he cited were unknown to Charity.

他引用的名字慈善机构不知道。

They had their own ideas about who committed all the robberies in the area, and Oliver was unknown to them.

谁常在这一带作案，他们自己心里有数，可奥利弗对他们来说却很陌生。

But here was a ditch overgrown with nettles, whose presence was unknown to Nekhludoff.

但这里有一条长满荨麻的沟渠， 聂赫留朵夫不知道它的存在。

In this we are necessarily defeated, since the actual Bismarck is unknown to us.

在这一点上我们必然失败， 因为真正的俾斯麦对我们来说是未知的。

We went from being unknowns to being known by the entire world, like literally overnight.

-我们从默默无闻变成了全世界都知道，就像一夜之间。

Its ruin may in some cases be unknown to him, and cannot directly affect him.

它的毁灭在某些情况下可能对他来说是未知的， 并且不能直接影响到他。

Their forms were unknown to him, but apprehension immediately guessed them to be engines of torture.

他不认识它们的形状， 但恐惧立即猜到它们是刑具。

Whither he has now gone, I regret to be obliged to say, is unknown to me.

他现在去了哪里， 我很遗憾不得不说，我不知道。

To the east the trail was unknown to them, and to the south there was no trail.

他们不知道东边的踪迹， 南边也没有踪迹。

He had discovered a new and secret method of transformations that was unknown to any other Sorcerer.

他发现了一种新的秘密转化方法， 这是任何其他魔法师都不知道的。

She is in the limelight, and behind her is a shadowy figure whose alias is unknown to us.

她是万众瞩目的焦点， 而在她身后是一个我们不知道化名的影子。