一个先前未知的极端分子组织声称其实施了周五的炸弹袭击。
A previously unknown extremist group has said it carried out Friday's bomb attack.
我记得那种对未知的恐慌感。
他默默地走进未知的世界。
这种色素为什么会存在和它可能有什么作用是未知的。
高考结束后，我们将告别彼此并启航驶向未知的未来。
After the College Entrance Examination, we will bid farewell to each other and set sail for an unknown future.
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。
A little bravery can result in the possibility of success when confronted with something unknown.
一个现实而紧迫的问题是，许多植物物种还没有被编目，因此它们在生态系统中的位置是未知的。
A real and pressing issue is that many plant species have not yet been cataloged, and so their place in the ecosystem is unknown.
西非所有从某个未知的日期开始记录的主要农作物都是从其他地方引进的，刚开始是种植水稻和山药。
All the recorded staple crops grown in western Africa were introduced from elsewhere, beginning, at some unknown date, with rice and yams.
所以如果这个符号是埃及古语，第一个符号应该是“ra”，然后是一个未知的符号，后面跟着一个双“S”音。
If the symbol were Coptic, the first symbol would be "ra" and then an unknown symbol followed by a double "S" sound.
因此，和英国人一样，Shirase 把他的探险描述为对知识的探索：他会带回化石，进行气象测量，并探索未知的大陆。
So, like the British, Shirase presented his expedition as a search for knowledge: he would bring back fossils, make meteorological measurements and explore unknown parts of the continent.
惊人数量的慢性病是由未知的环境因素引起的。
A surprising number of ailments are caused by unsuspected environmental factors.
地球上还有许多人类未知的地方。
There are many places on the earth that are still unknown to humans.
你可以在这里探索宇宙和它背后未知的奥秘！
Here you can explore the universe and the unknown mystery behind it!
走出你舒适的家，去一些未知的地方也是一种很好的体验。
Getting out of your comfortable home here to some unknown places is a good experience as well.
月球未知的一面总是远离我们，所以我们从地球上永远看不到它。
This is the unknown face of the moon that is always looking away from us, so we never see it from down here on the earth.
我的钱包不见了。我只能把钱包留在 G9 公交车上，如今，那辆公交车正在黑暗中飞速驶向某个未知的车站。
My wallet was gone. I could only have left it on the G9 bus, which was now speeding in the dark to some unknown station.
当潜水员道恩·沃特森向海绵专家克莱尔·古德温展示她的发现时，古德温确信这是一种在科学上未知的海绵。
When diver Dawn Watson showed sponge expert Claire Goodwin what she found, Goodwin was sure that it was a kind of sponge unknown to science.
从某种程度上来说，我是一名蚂蚁生物学家，所以我开始思考我们对昆虫的生命有什么了解，并且我知道昆虫世界对于人类而言仍有许多未知的领域。
I am, in part, an ant biologist, so my thoughts turned to what we know about insect life and I knew that much in the world of insects remains unknown.
栗子中害虫的命运在到达目的地之前是未知的。
The destiny of the pest in the chestnut is not known before reaching the destination.
在二氧化碳的数量方面，我们现在正在进入一个未知的领域。
We are entering into uncharted territory now, in terms of the amount of carbon dioxide.
随着时间的推移，这些选择可以累积成其他动物未知的进步壮举。
Strung together over time, these choices can accumulate into feats of progress unknown to other animals.
此外，当面对一些未知的事情时，一点勇气可以导致成功的可能性。
Furthermore, a little bravery can result in the possibility of success when confronted with something unknown.
尽管科学家们对宇宙已经了解甚多，但依然有许多我们未知的事物。
Though scientists have learned a lot about the universe, there is much we still don't know.
尸检分析显示出存在一种未知的病毒，以及一种已知的有毒细菌的证据。
Postmortem analysis showed the presence of an as yet unidentified virus, as well as evidence of a know bacterial toxin.
正是这种对未知的感觉，使得月球的远侧成为科学和太空研究的一个有趣的地方。
It's this sense of the unknown that makes the far side of the moon such an interesting place for scientific and space research.
头两个符号是未知的，但商博良知道，在最右边重复出现的象形文字代表“S”的声音。
The first two of these symbols were unknown, but Champollion knew that the repeated hieroglyphs to the far-right symbolized an "S" sound.
半融雪通过一种未知的物理过程被压实，而固态、无气泡的冰是由富含可溶性有机物的水形成的。
The slush is compacted by an unknown mechanism, and solid, bubble-free ice is formed from water high in soluble organic substances.
很难想象这会对牛产生怎样的影响，但这种关系可能会以某种未知的方式帮助或阻碍牛群的发展。
It is difficult to imagine how this could affect the cattle, but the relationship may help or hinder them in some way not yet recognized.
关键可能在于处理一些新问题； 挑战未知的事物很可能比一遍又一遍地做相同的拼图游戏更为有益。
The key may be tackling something new; the challenge of the unknown is likely more beneficial than putting together the same jigsaw puzzle over and over again.
几个世纪以来，探险家们冒着生命危险探索未知的世界，其原因在不同程度上与经济和民族主义有关。
For centuries, explorers have risked their lives venturing into the unknown for reasons that were to varying degrees economic and nationalistic.
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