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
acid-base determination
adlumidin
anapest
arnold gesells
bacteria of subtilis group
bar car
barcan
Bergstrom Air Force Base
bolingers
book system
BSAEP
cantilever erection
cardiac dropsy
cellular biophysics
citizenship status
coaxial cable attenuation
compass card axis
cooled-off
corriendo
dichlorotrazinylaminofluorescein
dihydroxyacetophenone
DNA(cytosine-5)-methyltransferase
drug distribution system
dynamic stability condition
dynamix
ectogenic teratism
eight-part
ellipsoidal geodesy
false pleiotropism
field divider
formation map
Galton system of identification
hepatolienography
hotelling-pabst test
hyperintellectual
innotate
integral erection
Little Poland Uplands
liver flukes
loose cash
mangement
materials returned report
maximation
medium shade
methyl isobutyl ketone wax deoil ing
meting out
microsoft sql server desktop engine
mirror nucleus
mla
monomethylolurea
Natrotremolite
neophytic operation
North Grimston
on line analyzer
outle
papularsyphilid
parent-teacher organization
Phai, Ko
phasor power
Phyllophorina kotoshoensis
pinch-off conditioning
plexus gulae
pneumatic cell
positive real matrix
potentilla saundersiana royle
press bureau
propreantepenultimate
psychological primary
quica
radio-trackings
receive the sacrament upon
Recognized Subject of Salvage
red colo(u)ration
rhynchophora
rimmed
rust inclusion
sasajiscymnus lamellatus
scope of official duty
secondary ion mass spectrometer
section signs
semifirm
Shanahan
Shimo-koshiki-jima
sign variable function
soft chair
spring back labyrinth gland
stud muffin
switched telephone traffic
take your medicine
telvar
tentative data)
thunderstick
transportation research
transportation tank
typhoid
understood and another
undishonested
unnewsed
vapor-pressure deficit
waisted cauldron
work of breathing
Zhu'anxin