时间:2018-12-02 作者:英语课 分类:Scientific American(十二)月


英语课

 This is Scientific American's sixty seconds science, I'm Steve Mirsky. Got a minute?


The eastern green tree frog looks exactly like the close related cops gree tree frog, the big difference between the two species is beneath the surface. The eastern has twice the number of chromosomes 2 as those of the cops. Having more size of chromosomes makes the cells of eastern frog larger than the cells found in the cops, and those bigger cells make the eastern's sound just a little deeper. Now University of Missouri researcher Crow G. and a student Mickey Tarker have determine that the slight difference in the calls here is the eastern again. And here is the cops. Is that the females know which species males * with the ones was the same chromosome 1 number that they have. The work is in the Proceedings 3 of the Royal Society B Biological Sciences. Speciation is often caused by a geographic 4 barrier that keeps population from mating, but the tree frog situation maybe a rare case in which chromosome duplication and * presented a reproductive barrier. As a new man it comes down to wether they calls.
Thanks for the minute of Scientific American's sixty seconds science, I'm Steve Mirsky. 
This post was generated by put listening repetition system,  Check the original dictation thread!

1 chromosome
n.染色体
  • Chromosome material with exhibits of such behaviour is called heterochromatin.表现这种现象的染色体物质叫做异染色质。
  • A segment of the chromosome may become lost,resulting in a deletion.染色体的一个片段可能会丢失,结果产生染色体的缺失。
2 chromosomes
n.染色体( chromosome的名词复数 )
  • Chromosomes also determine the sex of animals. 染色体也决定动物的性别。 来自《简明英汉词典》
  • Each of four chromosomes divide longitudinally. 四种染色体的每一种都沿着纵向分裂。 来自《现代汉英综合大词典》
3 proceedings
n.进程,过程,议程;诉讼(程序);公报
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
4 geographic
adj.地理学的,地理的
  • The city's success owes much to its geographic position. 这座城市的成功很大程度上归功于它的地理位置。 来自《简明英汉词典》
  • Environmental problems pay no heed to these geographic lines. 环境问题并不理会这些地理界限。 来自英汉非文学 - 环境法 - 环境法
标签: SSS 托福素材
学英语单词
androgyne
antiseptic solution
arranged standard
babyshe
backraking
Bertincourt
bicellular hair
bodes
boetti
Bowlby
bridge hand
chattiest
Chirita pteropoda
clock pulse generator
coded transmitter
coking characteristic
combination service
cranion
cyclolabia
dalbraminol
death from manual strangulation
dissociators
duity
extreme multicollinearity
fluorescent color
garse
girl-friends
governor drive
heliodors
high-speed data collection system
hook attachment for trailer
houttuyninum
humilation
hydroform method
ignition current
interferometric method
intermediate gear box
iron and steel casting
Italian sonnet
jet-type deaerator
joint-stock
kurcholessine
lock step pricing
macronychia
Marahuaca, Cerro
methyl-isorhodanate
minimal uncountable cardinal
minimum test duration
near-equatorial trough
news editor
noiseless recording
nonlottery
novobiocinum natricum
orange-peel grab
osthenol
packed-bed filter
pellagral gingivitis
penicillium spinulosam
phosphoglucomutase(PGM)
physioprints
Popish Plot
pre finance
predetonation
procaccianti
proliferation of fund
pulsatron
pulse-jet
quantum of action
quarterfinals
radio frequency band
raughter
re-appearing
reducing tee
refractive anomalies of the eye
resin casting installation
school-age child
sclerothricin
screw type lens mount
shut off sequence
silent cutter
Sohwa-ri
South Georgia
specific tenacity
suicide-bomb
surface limit
system of inspection on quality
take shelter from
teflon-coated
thermoindicator
thermotic
thumb on the scale
tin protochloride
to-gang
took courage
trap lines
united states carriage of goods by sea act 1936
unstable radical
ureido
Wilks' disease
wintrily
wire leading roll
yarn elongation test