时间:2018-12-27 作者:英语课 分类:英语时差8,16


英语课

 Fruit Fly Learning You might think those pesky little fruit flies gathering 1 around your fresh produce every summer are too stupid to know a banana from a pear. They’re barely large enough to see. They certainly can’t have that much brain power, can they? Well, fruit flies will never be rocket scientists, but researchers have discovered that they can learn from each other. Fruit flies, known as Drosophila melanogaster, grow from eggs to adults in about a week. Within the first forty-eight hours after emergence 2 into adulthood 3, female fruit flies mate and start laying eggs. Fruit flies life spans are short, lasting 4 only thirty to sixty days, and the survival of their eggs depends upon where they are laid. So how do females decide where to lay them? Many insect species are pre-wired genetically 5 to lay eggs on a particular plant or group of plants. Fruit flies may be pre-wired to some extent, but scientists have found that novice 6 females, those with no egg laying experience, learn from other females. When novices 7 observed experienced females laying eggs on a specific fruit, they preferred that fruit type later when laying their own eggs. Observing non-laying virgin 8 females, or being exposed to an aggregation 9 pheromone used to attract individuals to a location, did not create the same preference. Now that scientists know fruit flies are capable of social learning, they are excited about possible research into the evolution and neurogenetics of their learning ability. Fruit flies share many genes 10 with humans, and future research may unlock some mysteries of human learning as well. Unfortunately, none of this will probably keep those little flies off your fruit in summer.



1 gathering
n.集会,聚会,聚集
  • He called on Mr. White to speak at the gathering.他请怀特先生在集会上讲话。
  • He is on the wing gathering material for his novels.他正忙于为他的小说收集资料。
2 emergence
n.浮现,显现,出现,(植物)突出体
  • The last decade saw the emergence of a dynamic economy.最近10年见证了经济增长的姿态。
  • Language emerges and develops with the emergence and development of society.语言是随着社会的产生而产生,随着社会的发展而发展的。
3 adulthood
n.成年,成人期
  • Some infantile actions survive into adulthood.某些婴儿期的行为一直保持到成年期。
  • Few people nowadays are able to maintain friendships into adulthood.如今很少有人能将友谊维持到成年。
4 lasting
adj.永久的,永恒的;vbl.持续,维持
  • The lasting war debased the value of the dollar.持久的战争使美元贬值。
  • We hope for a lasting settlement of all these troubles.我们希望这些纠纷能获得永久的解决。
5 genetically
adv.遗传上
  • All the bees in the colony are genetically related. 同一群体的蜜蜂都有亲缘关系。
  • Genetically modified foods have already arrived on American dinner tables. 经基因改造加工过的食物已端上了美国人的餐桌。 来自英汉非文学 - 生命科学 - 基因与食物
6 novice
adj.新手的,生手的
  • As a novice writer,this is something I'm interested in.作为初涉写作的人,我对此很感兴趣。
  • She realized that she was a novice.她知道自己初出茅庐。
7 novices
n.新手( novice的名词复数 );初学修士(或修女);(修会等的)初学生;尚未赢过大赛的赛马
  • The Russians are such novices in Africa. 在非洲的俄国人简直都是些毫无经验的生手。 来自辞典例句
  • Where the primary track all novices, screams everywhere, ha ha good terror. 那里的初级道上全是生手,到处都是尖叫声,哈哈好恐怖的。 来自互联网
8 virgin
n.处女,未婚女子;adj.未经使用的;未经开发的
  • Have you ever been to a virgin forest?你去过原始森林吗?
  • There are vast expanses of virgin land in the remote regions.在边远地区有大片大片未开垦的土地。
9 aggregation
n.聚合,组合;凝聚
  • A high polymer is a very large aggregation of units.一个高聚物是许多单元的非常大的组合。
  • Moreover,aggregation influences the outcome of chemical disinfection of viruses.此外,聚集作用还会影响化学消毒的效果。
10 genes
n.基因( gene的名词复数 )
  • You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因,所以能够活得很长。 来自《简明英汉词典》
  • Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
学英语单词
active nest
ahead of the times
american association of farmers' institute worker
amnesties
amway
angular gap
annealable
apparelling
appentice
bendixsons
benthamites
bivalved
brake power
Breckenridge, Mount
bud dormancy
Caicara
call-back pay
cession number
charge-coupled frequency divider
common peripheral interface
complete sets of equipment
connections between factory and shops
customer experience
degree of reserve recovery
differential reinforcement
eigenberg
epigrammatising
establish sb in business
every silver lining has a cloud
field of lines behaviour
fiorentinoes
from above
function of motion
gas dome
gentlemanship
gorgerin
gradatories
granscarbamylation
graphical information
heating electrode
high impedance relay
Homestead Movement
honorand
horahs
indeficient
inoxidized
instimulation
isolated atom
Kuettner's ganglion
Kφng
lack of title
latrell
leader-figure
lenticelles
Lumpeto
maresca
medium heating furnace
multixtation seamer
municipal airport
neccessary
Nucleolites
ofre
only loadable
otocleisis
overbreakage
partridges
petroleum lubricant
Phetracha
polar reciprocal curve
pressure garment
prison-building
professional fee
pupil-teacher system
pure glutinous rice flour
rapid ceramic firing
reapir of partial atrio-ventricular canal
relational query
report tape
respiratory rhythmgenesis
reticulite
rift-sawed
round-the-clock emergency system
sal sedatirum
San Jose Oil Agreement
Sceaux
sectional roller
short-termisms
software systems
spherolite porphyry
steric sea level
theories-of-mind
tire load
tissue-specific gene knockout
took someone out
transfusive
transverse fold
twenty-high roll mill
type-tokens
venae auditivae internae
villainousnesses
yo mama