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nitration    音标拼音: [nɑɪtr'eʃən]
n. 用硝酸处理,硝化,硝基置换

用硝酸处理,硝化,硝基置换

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  • Hummingbird - Wikipedia
    Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae With approximately 366 species and 113 genera, [1] they occur from Alaska to Tierra del Fuego, but most species are found in Central and South America [2]
  • All 7 Hummingbirds in Utah [With Pictures Maps] - Wild Yards
    Trying to identify the hummingbird zipping around your yard? Hummingbirds are some of the most fascinating creatures that you can find in your backyard It really helps to know what species of hummingbirds live in Utah
  • 6 Types of Hummingbirds Found in Utah! (2025) - Bird Watching HQ
    Today, you will learn about the 6 hummingbird species found in Utah Each description includes identification tips, pictures, *range maps, fun facts, AND how to attract these beautiful birds to your yard!
  • Hummingbird | Description, Species, Videos, Facts | Britannica
    Hummingbird, any of about 320 species of small, often brightly colored birds of the family Trochilidae, usually placed with the swifts in the order Apodiformes but sometimes separated in their own order, Trochiliformes
  • Hummingbird Identification: An Illustrated Guide to all 14 North . . .
    Hummingbirds are among the most beloved birds, but identifying them can be a challenge They are tiny and restless Their color pattern can be difficult to discern on a tiny body and may look different when seen from different angles In low light, hummingbirds may look dark or black Things to Consider
  • 9 Hummingbirds in Utah (Common Rare) - Bird Feeder Hub
    Based on the range maps of authoritative sources like allaboutbirds org and ebird org, we’ve put together a list of hummingbirds that can be seen in the state of Utah The most common Utah hummingbirds are black-chinned hummingbirds, broad-tailed hummingbirds, rufous hummingbirds and calliope hummingbirds
  • Hummingbird - Description, Habitat, Image, Diet, and Interesting Facts
    Hummingbirds are charismatic, zippy little creatures that typically subside on the nectar of flowers Because they are so speedy, and their metabolism matches their speed, they must eat virtually constantly These little birds, native to the Americas, are incredibly unique and specialized Read on to learn about the hummingbird
  • 27 Common Hummingbird Species Types - Hummingbirds Plus
    This article explores 28 of the most widespread and familiar hummingbird species From the Ruby-throated Hummingbird gracing Eastern gardens to the energetic Rufous dashing about Western wildflower meadows, be captivated by the beauty and behaviors of these smallest of birds
  • Fascinating Hummingbird Facts | Almanac. com
    Learn some fun facts about hummingbirds—how much these tiny birds weigh, whether they can really see red, and what types you’ll see where you live Did you know that hummers do not flap their wings? Enjoy these fascinating hummingbird facts! These diminutive birds weigh only about 4 grams—or 141 ounces! That’s tiny!
  • The Hummingbird – A Gem of the Americas | UC Agriculture and Natural . . .
    Smallest hummingbird, Vinalaes, Cuba Jeanette Alosi The hummingbird is the smallest of all birds, and the smallest hummingbird is the bee hummingbird Mellisuga helenae of Cuba, which weighs as little as 1 95 grams (two almonds) and is only about two inches in length The typical hummingbird nest is about 1 and one-half inches in diameter (the size of a walnut shell), lined with plant down





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