mess 341 microscopic 理工 A 阅读押题 would lead a large ape one that 机会只给有准备的人。 resembles the 6 millionyear old Opportunities are only for ancestor we shared mon with the prepared person. living chimpanzees to walk on two legs. 理工阅读押题 我们大多数人每天都走路而 共 2 篇文章且手里搬着东西。这样的活动看似 第 34 篇 Batteries Built by Viruses 太简单,大多数人没有疑问。但是 第 48 篇 Researchers Discover 一个国际研究者(包括乔治 o 华盛 Why Humans Began 顿大学哥伦比亚艺术与科学学院 Walking Upright 的 Richmond 博士)团队已经发现 研究人员发现人类开始直立行走了人类直立行走可能源于数百万 的原因 年以前适应搬运稀有的、高质量的 Most of us walk and carry 资源。这些来自美国、英国、日本 items in our hands every day. These 和葡萄牙的研究者研究了当代黑 are seemingly simple 猩猩争抢食物时的行为特征,试图 activities that the majority of us 对什么样的生态环境竟然导致大 don't question. But an 猿(一种我们与现存的黑猩猩一样 international team of researchers, 的 600 万年前的祖先)直立行走作 including Dr. Richmond from GW's 出解释。 Columbian College of Arts and Sciences, have discovered that human walking upright , may have originated millions of years ago as an adaptation 源于 to carrying 搬运 scarce 稀有的, highquality 高质量的 resources 资源. The team of researchers from the U. S., England, Japan and Portugal investigated the behavior of modernday chimpanzees as they competed for M food resources, in an effort to understand what ecological settings mess 342 microscopic 足活动的强烈爆发可能导致了解 "These chimpanzees provide a 剖学上的变化,因此这种变化也就 model of the ecological conditions 成为自然选择的主题,在那种情况 under which our earliest 下,对食物或其他资源的争夺是 ancestors might have 十分激烈的。 begun walking on two legs, "said Dr. Richmond. "这些黑猩猩居住的生态环 Two studies were conducted 境和我们最早的祖先开始直立行 by the team in Guinea. The first 走时是相同的," Richmond 博士 study was conducted by the team in Kyoto University's 说。 "outdoor laboratory" in a natural clearing in The research findings suggest Bossou Forest. Researchers allowed that chimpanzees switch to moving the wild chimpanzees acce