英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

smutch    
n. 污迹
vt. 弄脏

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Types of Early Modern Human Tools - Facts and Details
    Modern human tools included bone needles, fish hooks, harpoons, antler batons, and a wide assortment of scrapers, knives and engravers Archaeological evidence from 30,000 to 10,000 B C shows that our ancestors were able to fracture, chip and shape rocks into a number of useful tools; use stone awls and burins (incising tools) to make barbed bone and antler harpoon points, atlatl throwing
  • Human Ancestors Crafted Advanced Tools Earlier Than Thought
    Early humans made sophisticated stone tools like hand axes 1 8 million years ago, a cache of artifacts from Kenya suggests JC Jennie Cohen Getty Images Print Collector Contributor
  • Earliest Human Tool Use: What a New Discovery Means | TIME
    Humans First Used Tools to Eat Meat 250,000 Years Ago Here’s What the Discovery Means All of the early hunting and butchering had cascading effects for later human species
  • Sharjah: 80,000-year-old tools found, discovery reveals 210,000 years . . .
    A groundbreaking study, recently published in Archaeological and Anthropological Sciences, a leading peer-reviewed journal by Springer Nature, has confirmed that early humans once lived in the
  • Homo sapiens - The Smithsonians Human Origins Program
    For millions of years all humans, early and modern alike, had to find their own food They spent a large part of each day gathering plants and hunting or scavenging animals By 164,000 years ago modern humans were collecting and cooking shellfish and by 90,000 years ago modern humans had begun making special fishing tools
  • Humans May Have Been Crafting Stone Tools for 2. 6 Million Years
    The latest findings suggest that separate groups of early humans invented stone tools on multiple occasions David R Braun Members of the Homo genus have been making stone tools for at least 2 6
  • EARLY HOMININ TOOLS: WHO MADE THEM AND HOW WERE THEY MADE? | Facts and . . .
    Stone tools are the oldest surviving type of tool made by hominin, our early human ancestors It is likely that bone and wooden tools were used quite early, but organic materials deteriorates with time and doesn’t survive like stone Archaeologists sometimes use the term 'lithics' to refer to all artifacts made of stone [Source: K Kris
  • Tools from 400,000 years ago show tech advances of early humans - Earth. com
    As elephant populations declined, early humans in the region shifted their focus to fallow deer Tools made from a variety of local stones have been found at Jaljulia, but something unique occurred when they began sourcing both their prey and tool-making materials from the Samarian highlands
  • Human Evolution: The Origin of Tool Use - Live Science
    Editor's Note: This is Part 8 in a 10-part LiveScience series on the origin, evolution and future of the human species and the mysteries that remain to be solved The way humans make and use tools
  • First tools ever used on Earth were not made by early humans
    How early tools shaped human evolution The discoveries in Kenya highlight how early technological innovations by hominins were pivotal in shaping humanity’s evolutionary path The Oldowan tools, that date back three million years, represent one of the earliest examples of humans using technology to solve problems
  • Thousands of Stone Tools Made by Early Humans Around 20,000 Years Ago . . .
    Prehistoric stone tool cores on display from the cave – credit, Sara Watson SWNS In a cave overlooking the ocean on the southern coast of Africa, thousands of stone tools made by early humans
  • Outline of prehistoric technology - Wikipedia
    Acheulean hand axes from Kent The types shown are (clockwise from top) cordate, ficron and ovate It was the longest-used tool of human history The following outline is provided as an overview of and topical guide to prehistoric technology Prehistoric technology – technology that predates recorded history History is the study of the past using written records; it is also the record itself
  • Later Stone Age Tools - The Smithsonians Human Origins Program
    When scientists discover a fossil skull, they compare it to skulls that have already been identified as particular early human species Now you get to be the scientist! View the Full Content >> 3D Collection Explore our 3D collection of fossils and artifacts: view, rotate, and explore hundreds of 3D scans! The early human tool kit;
  • 9. 6: Early Tool Use and Technology - Social Sci LibreTexts
    Invisible Tool Manufacture and Use; Chapter Summary; Hominin Species Summaries; The Early Stone Age (ESA) marks the beginning of recognizable technology made by our human ancestors Stone-tool (or lithic) technology is defined by the fracturing of rocks and the manufacture of tools through a process called knapping The Stone Age lasted for more than 3 million years and is broken up into
  • Stone tool - Wikipedia
    Stone tools have been used throughout human history but are most closely associated with prehistoric cultures and in particular those of the Stone Age Stone tools may be made of either ground stone or knapped stone, the latter fashioned by a craftsman called a flintknapper Stone has been used to make a wide variety of tools throughout history, including arrowheads, spearheads, hand axes, and





中文字典-英文字典  2005-2009