您現(xiàn)在的位置: Language Tips > BBC > Media English

    Species on Earth 地球可能有8百70萬物種

    Species on Earth 地球可能有8百70萬物種

    By Paddy Clark, BBC News

    Species on Earth 地球可能有8百70萬物種

    Scientists warn that human activity may threaten the survival of some species

    媒體英語會帶大家一起學習 BBC 撰稿人在報道世界大事時常用到的單詞和短語。

    Background: 科學家們研究出一項新的方式來估計在地球上生物的總數(shù),據(jù)統(tǒng)計一共有8百70萬種不同類型的生物。這同過去使用的評估方式得到的結(jié)果差距很大。科學家們的發(fā)現(xiàn)將在網(wǎng)絡(luò)科研期刊《生物科學公共圖書館》上發(fā)表。

    收聽與下載

    It's generally accepted that very many species have yet to be discovered, but until now nobody has devised a reliable way to find out just how many. Suggestions for total numbers have ranged from 3 million to a hundred million, but most of these have been no more than intelligent guesses.

    Scientists from the Census of Marine Life devised a counting method by identifying numerical patterns linking data on known species. They reckon that there should be about 8.7 million types of living organisms, three-quarters of them animals and the rest plants.

    However, since the introduction of the current classification system by Carl Linnaeus in 1758, only a million and a quarter have been catalogued.

    The scientists warn that human activity is hastening extinctions, and they note a touch wistfully, that many of the hitherto unknown species may vanish before we even know of their existence.

    Glossary 詞匯表 (收聽發(fā)音, 請單擊英語單詞)

    亚洲色偷拍另类无码专区| 久久久久久久人妻无码中文字幕爆 | 人妻AV中出无码内射| 亚洲av无码乱码在线观看野外| 无码av高潮喷水无码专区线| 精品久久久久久中文字幕大豆网| 亚洲Av无码精品色午夜| 欧美日韩中文字幕在线观看| 蜜臀精品无码AV在线播放| 久久AV高清无码| 亚洲热妇无码AV在线播放| 亚洲欧美日韩另类中文字幕组| 中文字幕无码日韩专区免费| 欧日韩国产无码专区| 精品无码一区二区三区爱欲| 亚洲国产精品无码成人片久久| 五月婷婷在线中文字幕观看 | 无码精品人妻一区| 久久久久亚洲AV无码永不| 永久免费av无码网站yy| 免费A级毛片无码无遮挡内射 | 久久超乳爆乳中文字幕| 亚洲av无码专区在线观看下载 | 亚洲成A∨人片天堂网无码| 麻豆aⅴ精品无码一区二区| 亚洲精品无码高潮喷水在线| 国产成人无码区免费内射一片色欲 | 精品久久久久久久无码| 无码区国产区在线播放| 亚洲中文字幕无码不卡电影| 国模无码人体一区二区| 最近高清中文在线字幕在线观看| 精品久久久久中文字幕一区| 亚洲欧美日韩国产中文| 亚洲日本中文字幕区| 日韩乱码人妻无码中文视频| 最好看更新中文字幕| 五月天中文字幕mv在线女婷婷五月| 中文无码vs无码人妻| 无码爆乳护士让我爽| 亚洲中文字幕无码不卡电影|