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Based on properties of the rock attached to some of the fragments, Arbour and her colleagues think the specimen may date to about 70 million years ago in the Upper Cretaceous Period.

基于附着在骨骼上碎石的特性，阿伯尔和她的同学们认为这一物种生活在0.7亿年前白垩纪早期。

He BC 9 years and 7 years ago, was held in Rome in the small type of winning the Arc de Triomphe.

他在公元前9年与前7年，获得了在罗马举行了小凯旋式的殊荣。

When you look at the archaeological record before 50,000 years ago, it is remarkably homogeneous

5万年以前的考古记录非常类似。

When you look at the archaeological record before 50,000 years ago, it is remarkably homogeneous.

5万年以前的考古记录非常类似，没有按地理分野的不同人工物品组。

Archaeological evidence suggests that the earliest humans in China date from 2.24 million to 250,000 years ago.

考古证据表明人类在中国地区出现的历史可追溯到224万年到250万年前。

6 million years ago , a kind of body hovers like the archaeopteryx of the plane greatly the llano in Argentina in the sky .

600万年前，一种体大如飞机的始祖鸟翱翔在阿根廷的大草原上空。

It wasn't quite global, so 25 years ago it was archaic, nonexistent by global standards.

在以前比赛不像现在这样的全球化，25年前的那一套在现在这样的全球标准下是行不通的。

Near seven years ago, a short while before his death in 1844, John Sterling committed the care of his literary Character and printed Writings to two friends, Archdeacon Hare and myself.

近7年以前，一个简短而去世之前，他在1844年，约翰英镑犯了他的文学创作和印刷字符照顾两个朋友，副主教野兔和我自己。

LUCA is defined as most recent organism from which all organisms now living on Earth descend (some 3.5 to 3.8 billion years ago, in the Archean era).

LUCA被定义为最近的有机体，所有现在生活在地球上的生物体都是从这一有机体传下来的（在太古时期，约35-38亿年前）。

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。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。