时间:2019-01-08 作者:英语课 分类:Scientific American(十一)月


英语课

Algae 1 seem harmless enough. These precursors 2 to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere 3 as well as dead zones in the oceans and now even a dead horse in France. 


 


That's right. The fumes 4 from decomposing 5 algae on a French beach killed a horse and rendered its rider unconscious this past summer. And poisonous tides caused by algal blooms make eating shellfish dicey at times as well as causing mass die-offs of fish, birds and even sea-going mammals. Plus, according to a new theory, that might just be a small taste of the plants' killing 6 ability.


 


James Castle and John Rodgers of Clemson University think that such algal blooms—triggered by warming water or an increase in nutrients—might be behind the five largest mass extinctions in Earth's history. 


 


Usually asteroid 7 impacts or massive volcanism get the blame, paired with climate change, but it may be the subsequent bloom in toxic 8 algae that really drove death. There's plenty of evidence for such blooms in the geologic 9 record. 


 


Of course, it remains 10 unclear whether algal blooms caused die-offs or merely coincided with them. And it's most likely that some combination of factors, including poisonous algae perhaps, helped wipe out 90 percent of all marine 11 life some 250 million years ago, for example.


 


The bad news? Such murderous algae is on the march again thanks to a changing climate, creeping northward 12 into newly warmer U.S. waters. Beware the killer 13 algae!


 



n.水藻,海藻
  • Most algae live in water.多数藻类生长在水中。
  • Algae grow and spread quickly in the lake.湖中水藻滋蔓。
n.先驱( precursor的名词复数 );先行者;先兆;初期形式
  • Phenyl (or polyphenyl) substituted epoxides serve as excellent precursors to phenyl (or diphenyl) carbenes. 某些苯代(或多苯)环氧乙烷是制取带苯环(或二苯)碳烯的极好原料。 来自辞典例句
  • Note the presence of megakaryocytes, erythroid islands, and granulocytic precursors. 可见巨核细胞,红细胞岛和粒细胞前体细胞。 来自互联网
n.陆界,岩石圈
  • The hydrosphere and the lithosphere together form the Earth's surface.水圈与岩石圈一起形成地球的表面。
  • They slide on a more yielding layer at the base of lithosphere.它们在岩石圈底部更柔软的一层滑动。
n.(强烈而刺激的)气味,气体
  • The health of our children is being endangered by exhaust fumes. 我们孩子们的健康正受到排放出的废气的损害。
  • Exhaust fumes are bad for your health. 废气对健康有害。
腐烂( decompose的现在分词 ); (使)分解; 分解(某物质、光线等)
  • The air was filled with the overpowering stench of decomposing vegetation. 空气中充满了令人难以忍受的腐烂植物的恶臭。
  • Heat was obtained from decomposing manures and hot air flues. 靠肥料分解和烟道为植物提供热量。
n.巨额利润;突然赚大钱,发大财
  • Investors are set to make a killing from the sell-off.投资者准备清仓以便大赚一笔。
  • Last week my brother made a killing on Wall Street.上个周我兄弟在华尔街赚了一大笔。
n.小行星;海盘车(动物)
  • Astronomers have yet to witness an asteroid impact with another planet.天文学家还没有目击过小行星撞击其它行星。
  • It's very unlikely that an asteroid will crash into Earth but the danger exists.小行星撞地球的可能性很小,但这样的危险还是存在的。
adj.有毒的,因中毒引起的
  • The factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
  • There is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。
adj.地质的
  • The Red Sea is a geologic continuation of the valley.红海就是一个峡谷在地质上的继续发展。
  • Delineation of channels is the first step of geologic evaluation.勾划河道的轮廓是地质解译的第一步。
n.剩余物,残留物;遗体,遗迹
  • He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
  • The remains of the meal were fed to the dog.残羹剩饭喂狗了。
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.向北;n.北方的地区
  • He pointed his boat northward.他将船驶向北方。
  • I would have a chance to head northward quickly.我就很快有机会去北方了。
n.杀人者,杀人犯,杀手,屠杀者
  • Heart attacks have become Britain's No.1 killer disease.心脏病已成为英国的头号致命疾病。
  • The bulk of the evidence points to him as her killer.大量证据证明是他杀死她的。
标签: SSS poisonou
学英语单词
a bird of paradise
a burden upon
abrasion geomorphy
adevism
aerothermo-elasticity
atomic compound
automatic distance control
autotrophically
barrel-type compressor
black sesame oil
boron detector
broker a deal
Bulganin, Nikolai Aleksandro-vich
cleam
conduction aphasias
cream holding
cunt-buster
data clustering
deceptation
disenslave
double-whammy
electrostatic copying
emulsion sintering method of spinning
engage relay
extended-precision
fertility factor (f factor)
Flu-glo
foreign debit balance
freeze-thaw cycles
gnatho-
good neighbour policy
gymnitids
head muscle
health preserving Qigong
homoclomin
hopeful monsters
HVDC transmission system
iliac index
index data base
insolvency guaranteed fund
integral action rate
inverse derivative unit
jumpily
Kushan
L-Citrulline
latent currency
leather-clad
leonardtown
lie
longhandled
louis aragons
manual titration
Markov programming
Matrand
mayfly
mean trajectory
Mobenzélé
morula spinosa
mud-flats
node admittance matrix
nongeospatial
over-regulations
oxifenamate
Pelham, Henry
periodical geodesic
Peshwari nan
Pharisian
pictorial encoding language
Pinheirinho
potassium guaiacolsulfonate
program check interrupt
pulwar
query response status
radiative collision
re-routings
reading achievement
recapitalize
screening tool
self handicapping
shell panel
shell-likes
software-defined datacenter
soundwise
spaf
Stachys taliensis
standard system action
standards of surveying and mapping
stow-ball
straight-billed
Sumte
superaudiable
threefoldness
trade-weighted value
train time
transportationed
tuit
vacancy jump
vignetting diaphragm
water-closets
went batshit
Zabolottya
Zuitzer