时间:2019-01-08 作者:英语课 分类:英语小短文


英语课

   英语短文:Cells and Temperature


  Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme 1 systems of mammals and birds are most efficient only within a narrow range around 37C;a departure of a few degrees from this value seriously impairs 2 their functioning. Even though cells can survive wider fluctuations 3 the integrated actions of bodily systems are impaired 4. Other animals have a wider tolerance 5 for changes of bodily temperature.
  For centuries it has been recognized that mammals and birds differ from other animals in the way they regulate body temperature. Ways of characterizing the difference have become more accurate and meaningful over time, but popular terminology 6 still reflects the old division into "warm-blooded" and "cold-blooded" species; warm-blooded included mammals and birds whereas all other creatures were considered cold-blooded. As more species were studied, it became evident that this classification was inadequate 7. A fence lizard 8 or a desert iguana-each cold-blooded----usually has a body temperature only a degree or two below that of humans and so is not cold. Therefore the next distinction was made between animals that maintain a constant body temperature, called home0therms, and those whose body temperature varies with their environments, called poikilotherms. But this classification also proved inadequate, because among mammals there are many that vary their body temperatures during hibernation 9. Furthermore, many invertebrates 10 that live in the depths of the ocean never experience change in the depths of the ocean never experience change in the chill of the deep water, and their body temperatures remain constant.

n.酵素,酶
  • Above a certain temperature,the enzyme molecule will become unfolded.超过一定温度,酶分子将会展开。
  • An enzyme that dissolves the fibrin of blood clots.能溶解血凝块中的纤维的酶。
v.损害,削弱( impair的第三人称单数 )
  • Smoking impairs our health. 吸烟会损害我们的健康。 来自《简明英汉词典》
  • Almost anything that impairs liver function can cause hepatitis. 任何有损于肝功能的因素,几乎都会引起肝炎。 来自辞典例句
波动,涨落,起伏( fluctuation的名词复数 )
  • He showed the price fluctuations in a statistical table. 他用统计表显示价格的波动。
  • There were so many unpredictable fluctuations on the Stock Exchange. 股票市场瞬息万变。
adj.受损的;出毛病的;有(身体或智力)缺陷的v.损害,削弱( impair的过去式和过去分词 )
  • Much reading has impaired his vision. 大量读书损害了他的视力。 来自《现代汉英综合大词典》
  • His hearing is somewhat impaired. 他的听觉已受到一定程度的损害。 来自《现代汉英综合大词典》
n.宽容;容忍,忍受;耐药力;公差
  • Tolerance is one of his strengths.宽容是他的一个优点。
  • Human beings have limited tolerance of noise.人类对噪音的忍耐力有限。
n.术语;专有名词
  • He particularly criticized the terminology in the document.他特别批评了文件中使用的术语。
  • The article uses rather specialized musical terminology.这篇文章用了相当专业的音乐术语。
adj.(for,to)不充足的,不适当的
  • The supply is inadequate to meet the demand.供不应求。
  • She was inadequate to the demands that were made on her.她还无力满足对她提出的各项要求。
n.蜥蜴,壁虎
  • A chameleon is a kind of lizard.变色龙是一种蜥蜴。
  • The lizard darted out its tongue at the insect.蜥蜴伸出舌头去吃小昆虫。
n.冬眠
  • Bears wake up in the spring after a winter of hibernation.熊经过一个冬天的冬眠后在春季苏醒。
  • The tortoise spends the winter months in hibernation.乌龟在冬眠中度过寒冬季节。
n.无脊椎动物( invertebrate的名词复数 )
  • Insects and worms are all invertebrates. 昆虫和蠕虫都是无脊椎动物。 来自辞典例句
  • In the earthworm and many other invertebrates, these excretory structures are called nephridia. 在蚯蚓和许多其它无脊椎动物中,这些排泄结构称为肾管。 来自辞典例句
标签: 英语短文
学英语单词
a catch
additional stresses abutment
age-based maintenance
as grown crystal
Astronomical Society of Australia
attedit
automatogen
averaged light measuring
body-piercings
bonville
calixarenes
capping the t
catch title
chinese society
clipper-clapper
countryfying
creative team
dairy-woman
date of large corrections
Denige's reagent
dichloronitroethane
duyker
edge rail
El Berrón
electric welded short link chain
electroencephalophone
empirical survival function
English proof agar
enman
expenditure encumbrance
eyewashing
Fahrenholz rule
faulty dental
finite free module
flatcompositron
fore-brain
gun car
harlock
immersional wetting
incised leaf
intermenstraal fever
interzooecial
IRS deadline
keitol
kokoretsi
light-bulb
liquid flow
mainline section
malocas
matriees
medianoche
meteorological element series
misknowledges
modified control limits
Mokhtārān
mollenkott
mowatts
Muang Ham
ni hao
non-weather-protected location
nonwives
Norlelobanidrine
normal tax rate
Ore Bay
overload recovery
partial pressure vacuum gauge
phonon-phonon collision
pigeoning
pollymite
polydiene rubber
proteidogenous
prune off
Punnett square method
receiver operating characteristic curve
relessors
rent-collector
restraint of marriage
ring hollow
rochambeaux
rouquet
run of river turbine
screw pair
sinisterness
skinmags
steady irrotational flow
Striatran
supersquare
tectonite
terminating network
the freedom of
thiocol
thrash something out
tongue joint with lug
traditional-styles
traffic utilization
transcription repression
tumuluses
unguiltiness
uniformly bounded above
video track straightness
Wehlerian