时间:2019-01-29 作者:英语课 分类:万物简史


英语课

 Then come Lyell's epochs—the Pleistocene, Miocene, and so on—which apply only to the most recent (but paleontologically busy) sixty-five million years, and finally we have a mass of finer subdivisions known as stages or ages. Most of these are named, nearly always awkwardly, after places: Illinoian, Desmoinesian, Croixian, Kimmeridgian, and so on in like vein 1. Altogether, according to John McPhee, these number in the "tens of dozens." Fortunately, unless you take up geology as a career, you are unlikely ever to hear any of them again.


接着就是莱尔所谓的“世”——更新世、中新世等——这些名称仅仅用来指最近的(但又是古生物学研究很活跃的)6500万年;最后,便是一大堆更细的分类,名叫“期”或“代”。其中大多数以地名命名,读起来几乎总是很拗口:伊利诺期、得梅因期、克罗伊期、金默里奇期等等,都具有同一特色。据约翰·麦克菲说,这类名称总共多达"几百个"。幸运的是,除非把地质学作为你的专业,你从此以后再也不大可能听到这些名称了。
Further confusing the matter is that the stages or ages in North America have different names from the stages in Europe and often only roughly intersect in time. Thus the North American Cincinnatian stage mostly corresponds with the Ashgillian stage in Europe, plus a tiny bit of the slightly earlier Caradocian stage.
更加混乱的是,北美的“期”或“代”跟欧洲的说法不一,在时间上往往只是大体交叉。因此,北美的辛辛那提期在很大程度上相当于欧洲的阿什吉利期,再加上一点儿稍早的喀拉多克期。
Also, all this changes from textbook to textbook and from person to person, so that some authorities describe seven recent epochs, while others are content with four. In some books, too, you will find the tertiary and quaternary taken out and replaced by periods of different lengths called the Palaeogene and Neogene. Others divide the Precambrian into two eras, the very ancient Archean and the more recent Proterozoic. Sometimes too you will see the term Phanerozoic used to describe the span encompassing 2 the Cenozoic, Mesozoic, and Paleozoic eras.
而且,这一切,不同的教科书、不同的人都有不同的叫法,因此有的权威提出7个代,而有的权威满足于4个代。在有的书里,你还会发现不用第三纪和第四纪,而是用不同长度的系来取而代之,称做下第三系和上第三系。有的人还把前寒武纪分成两个代,即非常古老的太古代和较近的元古代。有时候,你还可看到"显生宙"这个词,用来涵盖新生代、中生代和古生代。

n.血管,静脉;叶脉,纹理;情绪;vt.使成脉络
  • The girl is not in the vein for singing today.那女孩今天没有心情唱歌。
  • The doctor injects glucose into the patient's vein.医生把葡萄糖注射入病人的静脉。
v.围绕( encompass的现在分词 );包围;包含;包括
  • Being too large and all-encompassing is a common defect among state-owned enterprises. 过分追求大而全,是国企的一大通病。 来自互联网
  • Our services are: all-encompassing, love justice and high quality. 我们的服务目标是:全方位、真情义、高质量。 来自互联网
标签: 万物简史
学英语单词
accommodating transaction
additional element
Adrianouplis
air-ground radiotelephone
appointment of trustee
atmospheric vacuum distillation process
Ban Nong Hang
bends over
beneficial power
boded
body mechanics
Bursa subcutanea infrapatellaris
camile
carboxyheptyl
cerebral pia mater
cermet for cargo gear
charcoal revivifyig plant
circuit length
coincidence tuning
confirmed leeter of credit
conspecificity
deactivation of molecule
dichroa febrifuga lour.
die for special purpose
dilly bags
dividend check
domination principle
dual well
electrocardiogram scale
exilest
filtration control agent
fire assaying
first-order design
floating ring transmission
flylan (vlieland )
forebay dam
funis presentation
galeopsis tetrahits
genus Hypsiglena
geodetic station
globoid indexing cam mechanism
growth motivation
Guiscriff
h-reg
heaven knows
homopetalous
homoscedastic arrays
hydraulic plucking
Hydroton
IAMAP
in mora
international case-law
invariant assignment optimization
Japanese crucian carp
Jizhong
juasani-do (chwasari-do)
kneebars
LL-37
Man-aung Kyun
mineral cycle
morando
murmelstein
npc
pace-egg
palatalisation
pancreatitic
Payne, L.
perjuration
phenoltetraiodophthalein sodium
phosphoglucosamine acetylase
photonovel
polymeric immunoglobulin receptor
product of uniform space
punching drilling
putritude
quantum orthogonal signal
quick return
Rashomon-style
recirculation heater
rotational spectra
sandblast
scoot about
selenium(vi) fluoride
sifters
simultaneous estimate
slip erosion
sludge conditioning
solution basin
star-map
stockard
syndrome with good prognosis
table of type
thermoelectric power system
track scale
transmission box
ultimate wilting point
ultraviolet ray microscope
use characteristics
vaguely remember
villainry
water entrained by steam
Zurich agreements