时间:2018-12-24 作者:英语课 分类:Scientific American(二)月


英语课

 This is Scientific American 60 second science, I am Christopher Intagliata, got a minute? 


 
The most common types of ingested birth control contain estrogen. But the hormone 1 doesn’t just prevent human babies. It may be lowering numbers of frog babies, too. Because estrogens can travel unaltered through a woman’s system, and back into the environment—where they interfere 2 with the courtship of frogs.
 
Researchers bathed male frogs in tanks containing various concentrations of estrogen—comparable to levels previously 3 measured in nature. And they found that males exposed to estrogen made significantly fewer ‘advertisement’ calls: mating calls that say “hey ladies, I’m over here.” Instead, the frogs made more so-called ‘rasping’ calls: a sign the boys weren’t as turned on as they used to be.
 
As it turns out, neither were the ladies. Because when researchers played back estrogen-influenced calls to females, the lady frogs weren’t as hot to hop 4, compared to when they heard the crooning of control frogs. Those findings appear in the journal Public Library of Science ONE. 
 
The authors say less seductive mating calls could mean fewer tadpoles 5. Which means our sex lives could be partly to blame for making global populations of amphibians 6 croak 7.
 
Thanks for the minute for Scientific American 60 second Science, I am Christopher Intagliata!

1 hormone
n.荷尔蒙,激素,内分泌
  • Hormone implants are used as growth boosters.激素植入物被用作生长辅助剂。
  • This hormone interacts closely with other hormones in the body.这种荷尔蒙与体內其他荷尔蒙紧密地相互作用。
2 interfere
v.(in)干涉,干预;(with)妨碍,打扰
  • If we interfere, it may do more harm than good.如果我们干预的话,可能弊多利少。
  • When others interfere in the affair,it always makes troubles. 别人一卷入这一事件,棘手的事情就来了。
3 previously
adv.以前,先前(地)
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
4 hop
n.单脚跳,跳跃;vi.单脚跳,跳跃;着手做某事;vt.跳跃,跃过
  • The children had a competition to see who could hop the fastest.孩子们举行比赛,看谁单足跳跃最快。
  • How long can you hop on your right foot?你用右脚能跳多远?
5 tadpoles
n.蝌蚪( tadpole的名词复数 )
  • The pond teemed with tadpoles. 池子里有很多蝌蚪。 来自《简明英汉词典》
  • Both fish and tadpoles have gills. 鱼和蝌蚪都有鳃。 来自《现代汉英综合大词典》
6 amphibians
两栖动物( amphibian的名词复数 ); 水陆两用车; 水旱两生植物; 水陆两用飞行器
  • The skin of amphibians is permeable to water. 两栖动物的皮肤是透水的。
  • Two amphibians ferry them out over the sands. 两辆水陆两用车把他们渡过沙滩。
7 croak
vi.嘎嘎叫,发牢骚
  • Everyone seemed rather out of sorts and inclined to croak.每个人似乎都有点不对劲,想发发牢骚。
  • Frogs began to croak with the rainfall.蛙随着雨落开始哇哇叫。
标签: sss 托福素材
学英语单词
6-amino-NADP
addressivity
Agdz
alni
amynthas amis
analysis of materials' placement
anisic alcohol
annoyers
aptycha
arcyria marginoundulata
automatic document control system
Bacillus epidermidis
bank bookkeeping machine
battelle institute
betitled
bootstrap approximation
caffeinelike
cemented component
champion-elect
colo(u)r register
combing sliver
coming back
confined compressive strength
couch case
dance of the runes (n. europe)
definite time-lag switch
desert pavements
discharge valve seat
driving point immittance
dynamic lag
early-generation
ekarhenium
electroplating-bath
fibrillar neuroma
first order color
fosse moat
ground water geophysics
ground-effect boat
heating pipe
hernandoline
hydrosolubilities
indirect retainer
irrigation volume
jambuls
jellinek
jillions
JKG
kilopascal
leguminous forage
Lindfield
Long Akah
lower-frequency
made a delivery
Madonas Rajons
make a chump out of
malar flush
marker thread
mediatization
monocyttarian
motor with standardized mounting dimensions
nerat
NT scan
octyl acetate
oleo pneumatic strut
oliveys
overrich
papular dermatitis of pregnancy
parade officer
parent grain
pedal lever seal
Pedro I
Peltandra
retinal retinitis
rewetting temperature
roll chock
sattin
Scorzonera mongolica
scrubbed solvent
self-sower
severest
sinodural-angle
smoothing plate
somatotropes
sugar cane molasses
synasidia
team up with
throught the year
thunnus albacaress
time-delay relay
tracheotomies
two-tier price system
unpale
vacuumings
validation of redundancy management
vanadous chloride
vardan
vickers hardness standard machine
wachaggas
wire stirrer
write protect notch
ye wei
zwart wit pens