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英文字典中文字典相关资料:


  • Many Newly Discovered Species Are Already Gone | WIRED
    The Red List doesn’t include undescribed species, which some estimate could account for roughly 86 percent of the possibly 8 7 million species on Earth That’s partly due to the sheer numbers
  • Origins of Biodiversity | PLOS Biology
    Estimates have ranged from 2–100 million species on Earth today, with current estimates at the lower end of this range, perhaps from 2–8 million These estimates depend on the fact that only 1 8 million distinct species of modern animals, plants, fungi, and microbes have been named, and various means of extrapolation then provide the
  • Cat - Wikipedia
    As of 2024, the domestic cat was the second most popular pet in the United States, with 73 8 million cats owned and around 42 2 million households owning at least one cat [207] [208] In the United Kingdom, 26% of adults have a cat, with an estimated population of 10 9 million pet cats as of 2020
  • Milestones in Human Evolution - Smithsonian Institution
    By 6 million years ago: Early humans had evolved upright posture and the ability to walk upright on short legs Male canine teeth were about equal in size to females’, which indicates a significant shift in social life By 4 1 million years ago: Broad knee joints indicate clear adaptation to regular bipedal walking By 3 6 million years ago: Oldest definite early human footprint trails, with
  • 7. 4: Extinction - Biology LibreTexts
    The current diversity of species is a product of the processes of extinction and speciation throughout the previous 3 8 billion year history of life Raup (1991) assumed that there might be 40 million species alive today, but between 5 and 50 billion species have lived at some time during the history of the Earth
  • Worldwide distribution of the most important languages
    There are currently around 6,500 languages in the world The country with the most languages and dialects is probably Papua New Guinea, a country on the border between Asia and Australia with historically numerous trade relations in large parts of Asia, Australia and Oceania There are said to be over 800 individual languages there
  • Wildlife of Costa Rica - Wikipedia
    Besides the frog species, approximately 40 species of lungless salamander and two species of caecilian are found in the country, both rarely seen and little known Costa Rican amphibians range in size from the rainforest rocket frog , at 1 5 cm (0 5 in), to the giant toad, at up to 15 cm (6 in) and 2 kg (4 4 lb)





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