地球可能有870万物种
时间:2023-01-29 08:13:51
(单词翻译:单击)
科学家们研究出一项新的方式来估计在地球上生物的总数,据统计一共有8百70万种不同类型的生物。这同过去使用的评估方式得到的结果差距很大。科学家们的发现将在网络科研期刊《生物科学公共图书馆》上发表。
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
Census1 of
Marine2 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.
分享到:
点击
收听单词发音
1
census
|
|
n.(官方的)人口调查,人口普查 |
参考例句: |
- A census of population is taken every ten years.人口普查每10年进行一次。
- The census is taken one time every four years in our country.我国每四年一次人口普查。
|
2
marine
|
|
adj.海的;海生的;航海的;海事的;n.水兵 |
参考例句: |
- Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
- When the war broke out,he volunteered for the Marine Corps.战争爆发时,他自愿参加了海军陆战队。
|