时间:2019-01-02 作者:英语课 分类:60秒科学


英语课

《科学杂志》上的一项研究表明,硬骨滤食性鱼类用了10亿年的进化时间,占据了须鲸类现在的生态龛。另一项研究表明,鲸类的多样化取决于其食用的微生物类型。


Sometimes scientific discoveries are hidden in museum specimen 1 drawers and old journal articles. In two studies in the journal Science, researchers who went through the stuff in institutional attics 2 offer new insights into the development and diversity of filter-feeding whales—and the fish that first occupied that ecological 3 niche 4.


It had been thought that mammoth 5, filter-feeding fish—which swam through the water with a gaping 6, open mouth, collecting tiny marine 7 creatures—only lived fleetingly 8 before whales took their place in the food chain.


But a research team [led by Matt Friedman, University of Oxford] decided 9 to take a closer look at museum fossils of bony, pre-historic fish that had either been misclassified or ignored. They also reexamined previous studies.The investigators 10 now say that these fish filter-feeders lived from about 170 to 65 million years ago, a healthy stretch in which to pioneer and perfect the niche.


In a related study, scientists [Felix Marx, University of Otago, New Zealand and Mark Uhen, George Mason University] show that when filter-feeding whales took over from bony fish, their diversity was linked to the diversity of their dinner—the tiny creatures at the very bottom of the food chain –tiny algae known as diatoms

 



n.样本,标本
  • You'll need tweezers to hold up the specimen.你要用镊子来夹这标本。
  • This specimen is richly variegated in colour.这件标本上有很多颜色。
n. 阁楼
  • They leave unwanted objects in drawers, cupboards and attics. 他们把暂时不需要的东西放在抽屉里、壁橱中和搁楼上。
  • He rummaged busily in the attics of European literature, bringing to light much of interest. 他在欧洲文学的阁楼里忙着翻箱倒笼,找到了不少有趣的东西。
adj.生态的,生态学的
  • The region has been declared an ecological disaster zone.这个地区已经宣布为生态灾难区。
  • Each animal has its ecological niche.每种动物都有自己的生态位.
n.壁龛;合适的职务(环境、位置等)
  • Madeleine placed it carefully in the rocky niche. 玛德琳小心翼翼地把它放在岩石壁龛里。
  • The really talented among women would always make their own niche.妇女中真正有才能的人总是各得其所。
n.长毛象;adj.长毛象似的,巨大的
  • You can only undertake mammoth changes if the finances are there.资金到位的情况下方可进行重大变革。
  • Building the new railroad will be a mammoth job.修建那条新铁路将是一项巨大工程。
adj.口的;张口的;敞口的;多洞穴的v.目瞪口呆地凝视( gape的现在分词 );张开,张大
  • Ahead of them was a gaping abyss. 他们前面是一个巨大的深渊。
  • The antelope could not escape the crocodile's gaping jaws. 那只羚羊无法从鱷鱼张开的大口中逃脱。 来自《简明英汉词典》
adj.海的;海生的;航海的;海事的;n.水兵
  • 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。
adv.飞快地,疾驰地
  • The quarks and gluons indeed break out of confinement and behave collectively, if only fleetingly. 夸克与胶子确实打破牢笼而表现出集体行为,虽然这种状态转瞬即逝。 来自互联网
adj.决定了的,坚决的;明显的,明确的
  • This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
  • There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
n.调查者,审查者( investigator的名词复数 )
  • This memo could be the smoking gun that investigators have been looking for. 这份备忘录可能是调查人员一直在寻找的证据。
  • The team consisted of six investigators and two secretaries. 这个团队由六个调查人员和两个秘书组成。 来自《简明英汉词典》
学英语单词
abundance of commodity supplies
acetomercurihydroxypropane
agu
anemone storonifera maxim.
atomic explosion evidence
audit strategy
biatrial
binary notation
bloodened
branch controller
brassica nigras
broken hyperlink
Bulgarian monetary unit
bursa(equivalent)lymphocyte
can end press
Cephalomappa
chemoimmunologies
chin breadth
cockapoo
coldheartedness
common-base transistor
compounding effect
continu
coprozoic parasite
dental-records
Digitaria setigera
dolichoplatycephalus
double acting rotary engine
e-learning
east-meets-west
eddy available potential energy
error deformation string
facies interna
figure of merit (g/t) reliability increase
flavorx
floodmarks
frame grid
free-boot
front-wheel mechanism
frozen pack storage
genus Sphaerocarpos
gib boom
glaciations
Glinus lotoides
Glyped
green's
griege
Gurnee
hand gas grenade
he'bert
heavy hydraulic press
hospital ships
huz
intersectant
ITSO
job control table
land liable to flood
lever movement
local mode
loretto
Metaquine
monodical
mukumbi
new life
noduli valvularum semilunarium
nonbusiness itemized deductions
noncyclotomic
Papa, Holm of
Pelly Mts.
phase generator
picosulfate sodium
pituitary gonadotropic hormone
post-auditings
primary power source
protester
rafiah
remote control board
resource centre
rhizoma
rigid surface planing
roller with trunnions
Rosetown
sail one's own boat
Scaferlati
sericitizations
set shackle
sige
six-miler
stop-watch cycle time
storgae cell
streamlined pump
Success, L.
supercritical gas
swaziland monetary units
synergism
tangle with sb
Teach, Edward
tetradrachms
the left
thyris alex
wriggled out of
zinc thymotate