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用"billion years ago"造句"billion years ago" in a sentence"billion years ago"怎麼讀

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  • 億年前

例句與用法

  • At some time more than five billion years ago the universe started .
    在50億年前的某個時候,宇宙開始形成。
  • Yet oxygen gas did not begin to accumulate in the atmosphere until about 2 billion years ago .
    但是大約在20億年前,氧氣才開始在大氣層中積累。
  • The organisms living between 3 and 1 billion years ago were not as versatile as modern species, probably due to energy limitation .
    生活在過去二十億年之間的有機體可能由于能量的限制,不如現代物種這樣五花八門。
  • Our solar system was formed 4 . 6 billion years ago
    我們的太陽系被形成了4 . 6十億年前。
  • The supernovae exploded between 3 . 5 and 10 billion years ago
    超新星爆炸時間在35 - 100億年前。
  • What prompted the leap in complexity starting 1 . 5 billion years ago
    那么是什么推動了發生在15億年前的復雜性的飛躍呢?
  • About 5 billion years ago
    五十億年以前
  • About 13 . 7 billion years ago a tremendous explosion started the expansion of the universe
    大約13 . 7十億年前巨大爆炸開始了宇宙的擴展。
  • Just as the solar system was forming some 4 . 6 billion years ago , it turned itself inside out
    太陽系的形成發生在大約46億年前,那會兒它里外翻了個身。
  • For example , the researchers date the split between plants and animals at 1 . 6 billion years ago
    例如,研究者確定植物和動物大概是在16億年前開始產生差異。
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