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  3. A "LOST TRIBE" that reached America from Australia may have been. the first Native Americans, according to a new theory. (46

A "LOST TRIBE" that reached America from Australia may have been. the first Native Americans, according to a new theory. (46

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问题     A "LOST TRIBE" that reached America from Australia may have been. the first Native Americans, according to a new theory.
    (46)If proved by DNA evidence, the theory will shatter long established beliefs about the southerly migration of people who entered America across the Bering Strait, found it empty and occupied it. On this theory rests the authority of Native Americans (previously known as Red Indians) to have been the first true Americans. They would be relegated to the ranks of also-rans, beaten to the New World by Aboriginals in boats.
    To a European, this may seem like an academic argument, but to Americans it is a philosophical question about identity, Silvia Gonzales of Liverpool John Moores University said.
    Her claims are based on skeletons found in the Baja California Peninsula of Mexico that have skulls quite unlike the broad Mongolian features of Native Americans. These narrow-skulled people have more in common with southern Asians, Aboriginal Australians and people of the South Pacific Rim.
    (47)The bones, stored at the National Museum of Anthropology in Mexico City, have been carbon-dated and one is 12,700 years old, which places it several thousand years before the arrival of people from the North. "We think there were several migration waves into the Americas at different times by different human groups," Dr. Gonzales said. "The timing, route and point of origin of the first colonization of the Americas remains a most contentious topic in human evolution."
    (48)But comparisons based on skull shape are not considered conclusive by anthropologists, so a team of Mexican and British scientists, backed by the Natural Environment Research Council, has also attempted to extract DNA from the bones. (49)Dr. Gonzales declined yesterday to say exactly what the results were, as they need to be checked, but indicated that they were consistent with an Australian origin.
    (50)She believes that they arrived by boat, settled in what is now Mexico and at other points along the Pacific coast, and survived for thousands of years. The first Spanish colonists and missionaries described the people they found in the area, the Pericue, as slim hunter-gatherers. They lacked much culture, but did have burial customs in which bodies were laid out in the sun before being painted with ochre and buried.
    The Spanish collected the people into missions, where they died out in the 18th century.

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答案但是人类学家认为头骨形状的比较并不能成为确凿证据，所以一个由墨西哥和英国科学家组成的小组在自然环境研究委员会的支持下，试图从这些骨骼中提取DNA。
解析 本句是复合句，句子主干结构是comparisons are not considered conclusive。so a team of Mexican and British scientists has also attempted to extract DNA from the bones是结果状语从句；过去分词短语backed by the Natural Environment Research Council作定语，修饰a team。本句中出现了被动语态are not considered及 backed，分别译成语义对应的主动形式"…认为"和"在…的支持下"。此外，还应进行词义引申和词性转换。句中conclusive是形容词，意为"结论性的"，翻译时，如果直接将原意译出则译文不够流畅，这里可根据语义，译成"成为确凿证据"。
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