科學60秒:時光之樹——尋找物種起源
來源：滬江聽寫酷
2011-05-22 00:01
文章較難，大家聽寫填空即可~
There’s a cool new Web site—and iPhone app—that could ____1____ in a wide variety of circumstances. It’s called Time Tree. And it tells you how closely related any two organisms are over time. In other words, it’ll tell you what the available data say is the time since any two organisms shared a common ancestor. Time Tree is ____2____ run by Penn State’s Blair Hedges and Arizona State’s Sudhir Kumar.
So let’s say you’re out for a walk in the woods, with your iPhone handy, and you ____3____ a grizzly bear. You quickly load the app and ____4____ the two organisms you’re interested in. Those would be you, a human, and grizzly bear, the thing that’s approaching you alarmingly fast. In just a couple of seconds, you are informed that you and the grizzly bear shared a common ancestor just 98.2 million years ago.
If you have a computer and are just curious about the grizzly bear, go to . The results average the findings of published papers ____5____ your search and include links to the papers.
There’s a cool new Web site—and iPhone app—that could ____1____ in a wide variety of circumstances. It’s called Time Tree. And it tells you how closely related any two organisms are over time. In other words, it’ll tell you what the available data say is the time since any two organisms shared a common ancestor. Time Tree is ____2____ run by Penn State’s Blair Hedges and Arizona State’s Sudhir Kumar.
So let’s say you’re out for a walk in the woods, with your iPhone handy, and you ____3____ a grizzly bear. You quickly load the app and ____4____ the two organisms you’re interested in. Those would be you, a human, and grizzly bear, the thing that’s approaching you alarmingly fast. In just a couple of seconds, you are informed that you and the grizzly bear shared a common ancestor just 98.2 million years ago.
If you have a computer and are just curious about the grizzly bear, go to . The results average the findings of published papers ____5____ your search and include links to the papers.
come in handy
jointly
run into
key in
relevant to
有個很酷的新網(wǎng)站和iPhone應用程序，名為“時間樹”（Time Tree），它隨時隨地都能派上用場。它會告訴你，隨著時間的推移，任意兩個有機體之間的關(guān)系會有多密切。換句話說，它會通過現(xiàn)有數(shù)據(jù)告訴你任意兩個有機體是在何時擁有共同祖先的。時間樹由賓夕法尼亞州立大學的布萊爾?赫奇斯和亞利桑那州立大學的古普塔?庫馬爾共同開發(fā)。
現(xiàn)在我們假設(shè)你外出到一個樹林里散步，隨身攜帶著iPhone，在林中你碰巧遇到了一只灰熊。你迅速打開這個程序，輸入兩個你所感興趣的有機體。一個是你——人類，另一個是灰熊——那個正在以驚人速度接近你的龐然大物。短短幾秒鐘的時間，你就可以查詢到你與灰熊在九千八百二十萬年前擁有共同的祖先。
如果你有臺電腦，并對灰熊感興趣，那么上時間樹網(wǎng)站試試吧，網(wǎng)址是。查詢結(jié)果是與你搜索內(nèi)容相關(guān)的已發(fā)表論文中研究結(jié)果的平均值，而且查詢結(jié)果中會列出這些論文的鏈接地址。
