查询词典 Hadean

The origin of life is still a poorly understood process, but it is thought to have occurred about 3.9 to 3.5 billion years ago during the hadean or archean eons on a primordial earth that had a substantially different environment than is found at present.

对于生命起源，我们仍知之甚少，但是据猜测生命起源于距今35亿年到39亿年前，原始地球的冥古代或太古代，当时地球上的环境跟现在大不相同。

"I think we're in basic agreement on" the habitability of the Hadean, says geophysicist Norman Sleep of Stanford University in Stanford, California, who has done similar calculations.

"我认为，我们在冥古代适于生存的问题上意见基本一致，"加州斯坦福大学的地球物理学家诺曼·斯利普说。

It's called the Hadean or Dark Period because nobody knows anything about it.

它叫做冥古代或黑暗期，因为人们对其一无所知。

Previous work on the diamonds supports the notion that similar processes were occurring on the Hadean Earth.

以前的研究证实，在冥古宙这样类似的过程是可以发生的。

The Hadean begins with the Moon-forming impact (at time = zero in this figure).

冥古代以月球形成的撞击为开始（时间=在该图中为零）。

Scientists describe this phase in Earth history as the Hadean, and it has long been thought that it would be impossible for life to begin at this time because of the inhospitable conditions on the young planet.

可是现在，一切都在改变。地质学的天空也开始有了两朵乌云。

So, despite the excitement of finding such primeval pieces of the earth, most scientists, including me, continued to accept the view that the climate of our young planet was Hadean .

因此，尽管找到这麽原始的地球残片是如此令人振奋，包括我在内的大部份科学家仍然继续采信地球年轻时的气候是超古元状态的观点。

"I think we're in basic agreement on" the habitability of the Hadean, says geophysicist Norman Sleep of Stanford University in Stanford, California, who has done similar calculations.

&我认为，我们在冥古代适于生存的问题上意见基本一致，&加州斯坦福大学的地球物理学家诺曼·斯利普说。

Four billion years ago, asteroids and comets rained down on our planet with such ferocity that scientists have labeled the era the "Hadean "--literally, hell on Earth.

40亿年以前，小行星和彗星犹如雨点一般密集地砸在地球上，撞击极为猛烈，科学家们管这个时代叫做&冥古代&，顾名思义就是地球上的地狱时代。

Precambrian time is now divided into three eons: Hadean, from the earth ' s origin to about 3900 Ma; Archaean, 3900-2390Ma; and Proterozoic, 2390-570 Ma (the Cambrian marks the start of the Phanerozoic eon, which extends to the present day).

现在将前寒武纪分为三个时代；冥古代，从地球诞生到约39亿年前；太古代，39亿年前—23.9亿年前，以及原生代，23.9亿年前—5.7亿年前（寒武纪标志显生代的开始，延续至今）。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。