億年前 的英文怎麼說

中文拼音 [yìniánqián]
億年前 英文
billion years ago
  • 億 : 數詞（一萬萬） a hundred million
  • 年 : Ⅰ名詞1 （時間單位） year 2 （元旦或春節） new year 3 （歲數; 年紀） age 4 （一生中按年齡劃分的階...
  • 前 : Ⅰ名詞1 （在正面的） front 2 （次序在先的） first; top 3 （過去的; 較早的） ago; before; preceding...
  1. According to the conventional hypothesis, the earliest living cells emerged as a result of chemical evolution on our planet billions of years ago in a process called abiogenesis

    根據傳統的假說，最初的活細胞，肇生於數十億年前地球上的化學演化過程，這種說法稱為無生源說。
  2. It was early in the archaean era, 3. 8 to 2. 5 billion years ago, that life first appeared on earth

    它在及早在archaean時代， 3 . 8到2 . 5十億年前，生活第一次出現在地球上。
  3. 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。
  4. It dates from 125 million years before biplanes were invented

    在雙翼飛機問世之前的1 . 25億年前，這種動物翱翔在天空。
  5. Looking at these isotopes allows the chondrules to be dated, and they were formed 4. 56 billion years ago

    觀察這些同位素可以估算出隕石球粒的年齡，他們是在45 . 6億年前形成的。
  6. Composed of micro diamonds, aluminum oxide, and silicon carbide, the isotopic distribution of these grains bore the telltale marks of their birth : ancient supernovas and red giant stars, that shone brightly and then flickered out, billions of years ago, before the birth of the solar system

    由微金剛石、鋁氧化物、碳化硅組成的這些微粒的同位素分佈透露出它們的誕生：那些數十億年前，在太陽系尚未誕生時，曾經閃耀並最終熄滅的古老超新星和紅巨星。
  7. Lead author zulma gasparini of argentina ' s national university of la plata said the " animal ' s anatomy is really a contrast with that of the other sea crocs that developed during the jurassic, " about 135 million years ago

    研究報告主要撰寫人阿根廷國立大學的祖瑪蓋斯帕里尼也表示，這種巨鱷的身體結構和那些生活在約1 . 35億年前侏羅紀時期的其它海洋鱷魚有著很大的差異。
  8. The karst formation of phong nha - ke bang national park has evolved since the palaeozoic ( some 400 million years ago ) and so is the oldest major karst area in asia

    豐芽格邦國家公園的喀斯特地貌的形成是從古生代（大約40億年前）開始的，是亞洲最古老的喀斯特地貌。
  9. You can see a vein, like 人 the chinese character, of pegmatite formed about 2. 6billion years ago intruding in the granodiorites mass formed about 2. 7billion years ago

    26億年前後形成的偉晶巖侵入到27億年前後形成的花崗閃長巖中，形成「人」字形脈體。
  10. Models of the solar system ' s early history posit that the frequency of impacts should have tapered off between 4. 5 billion and four billion years ago because most of the planetesimals ? the small rocky bodies that formed from the solar nebula ? were gradually cast out of the inner solar system or absorbed by the outer planets

    描述太陽系早期歷史的模式假設，撞擊頻率應該在45 ~ 40億年前趨緩，因為大部份的微行星（由太陽星雲形成的小型石質天體）逐漸被驅逐出內太陽系或被外行星吸收。
  11. Fossil evidence has suggested that there was a major jump in eukaryotic complexity some 600 million years ago, during a period dubbed the cambrian ex - plosion

    化石證據已經顯示出在大約在6億年前，原核細胞復雜體在被稱為「寒武紀大爆發」的時期發生了一次大的飛躍。
  12. Radioactive dating showed the crystals from western australia varied in age from 3. 06billion to 4. 25billion years ， making them almost 1billion years older than the previous oldest - knowndiamonds

    放射性斷代測出來自澳大利亞西部的這種晶體在30 . 6億到42 . 5億年前間發生變化，這比之前已知最古老的鉆石還早10億年左右。
  13. Rhodopsin is similar in both structure and absorption characteristics to the cone pigments most sensitive to wavelengths in the middle of the visual spectrum, and it evolved from those pigments hundreds of millions of years ago

    就構造與吸收光譜特性而言，視紫質與中波長錐色素最為相似；幾億年前，視紫質從這些中波長錐色素演化了出來。
  14. The trypanosome, which branched from other eukaryotes 300 million years ago, breaks this universal rule

    在三億年前從其他的真核生物分支出去的錐蟲，卻打破了這條通用的法則。
  15. A handout photo of a fossilised 190 - million - year - old unhatched dinosaur embryo provided by south africa ' s wits university in johannesburg and university of toronto at mississauga in canada, july 29, 2005

    這張南非金山大學和加拿大多倫多大學7月29日公布的照片，顯示的是1 . 9億年前的一枚恐龍蛋中未完全孵化的恐龍胚胎化石。
  16. A scientist in scotland has discovered tracks made by a huge water scorpion 330 million years ago, the first of the species ever discovered and the only evidence showing it could survive outside of the water, according to the journal nature ' s edition to be published thursday

    英國學者日前在蘇格蘭境內發現了3 . 3億年前，一隻巨大的水蝎water scorpion在爬行時留下的痕跡。這是人們發現的首個，同時也是惟一一個證明該物種在脫離水的地方也能生存的證據。
  17. It is possible, for example, that a very large body in the asteroid belt broke apart about 3. 9 billion years ago and that the debris was swept toward the earth - moon system

    舉例來說， 39億年前可能有一個非常大的天體由小行星帶中分出，其遺屑向地月系統橫掃而來。
  18. 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。
  19. 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。
  20. The supernovae exploded between 3. 5 and 10 billion years ago

    超新星爆炸時間在35 - 100億年前。
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