单词：cenancestor
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By Jessica Berman Washington 31 May 2007 Scientists say early human ancestors may have begun walking on two legs on tree branches, not on the ground as commonly believed. The evidence contradicts the long-held belief that early humans first began wal
2007年VOA标准英语（五月）
联合国呼吁拉美国家提供人身安全保障 MEXICO CITY, Oct. 28 (Xinhua) -- A UN official has called on Latin American countries to battle insecurity and ensure security for their people, according to a news release reaching here on Monday.
英语新闻
New Species Might be Human Ancestor Fossils found in a South African cave might belong to a new species of early humans that holds a unique place on the evolutionary road to modern man. On a 2008 mapping expedition in Malapa, South Africa, American p
VOA标准英语2011年(九月)
ROBERT SIEGEL, HOST: War movies don't get much smaller than The Wall. It's from the director who made the first Bourne movie, and this new film is stripped to absolute essentials - men, guns, desert. Critic Bob Mondello says as small as it is, The Wa
2017年NPR美国国家公共电台5月
57 这种动物是人类的祖先吗？ DATE=6-13-01 TITLE=SCIENCE REPORT - Ancestor of Humans BYLINE=Jill Moss (Start at 59
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