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乌鸦和人一样爱憎分明 能够记住仇人面孔
[导读]西雅图的研究人员称被捕获的乌鸦会记住捕获者的面孔，并且记下仇恨。
腾讯讯（过客/编译）乌鸦不会忘记一张面孔而且也会记仇。西雅图的研究人员去年声称被捕获的乌鸦会记住捕获者的面孔。尽管它们是在几年前看到的危险面孔，但是试验中的乌鸦会冲诱捕者大叫并且俯冲攻击它，试验表明这种鸟类会牢牢的记住一种消极的关系。在进行大脑扫描之前，乌鸦被分别放到佩戴危险面具或者关爱面具的人面前现在研究人员的追踪研究表明当乌鸦看到它们认识的一张面孔时它们的大脑会像人类一样表现出情绪。华盛顿大学的首席研究员John Marzluff在一份声明中说到：“乌鸦大脑中反应的区域与哺乳动物是不同的，这些区域被怀疑在鸟类中起着作用，但是直到现在还没有文件证明。”在研究中，12只雄性成年乌鸦被全都戴着某种面具的研究人员捕获，这些面具涉及到危险面孔的研究。然后在被囚禁的四个周时间里，这些乌鸦被戴着一张不同面具的人喂养。尽管两种伪装都拥有自然的表情，这种面具被用作关爱的面孔。为了了解乌鸦看到两种面孔时大脑会出现什么状况，研究人员们为完全警惕的乌鸦注入了一种葡萄糖液体。这些乌鸦随后就被放到佩戴危险面具或者关爱面具的人面前15分钟时间，然后就会被注射镇静剂并且进行脑部扫描。葡萄糖液体揭示了当它们面对佩戴某种面具的人时，它们大脑的哪一部分最活跃。Marzluff称聪明的鸟类大脑中有个区域类似于哺乳动物的扁桃腺。他在声明中说到：“扁桃腺是脊椎动物大脑中将消极影响储存为记忆的区域。之前的研究主要研究它在哺乳动物中的功能，我们的研究表明在鸟类大脑中有一个类似功能的系统。”这项研究在本周的美国国家科学院院刊上进行了详细报道，这项研究表明管理员或许能够通过长期的良好饲养来减少被捕获动物的压力。Marzluff说到：“通过喂养和关心被囚禁的鸟类，它们的大脑活动表明这些鸟类把它们的饲养员作为重要的社会伙伴而不是必须要害怕的动物。”他补充道，这些发现甚至有可能用于改变乌鸦行为，能够通过一次食用罕见物种的糟糕体验来训练它们避免一些特别的捕食。
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Copyright & 1998 - 2016 Tencent. All Rights ReservedCower - definition of cower by The Free Dictionary /cower
cower Also found in: , , , .Related to cower:
(kou′ər)intr.v.
cow·ered, cow·er·ing, cow·ers
To cringe in fear.[Middle English couren, of Scandinavian origin.]cower ('ka??) vb (intr) to crouch or cringe, as in fear[C13: from Middle Low German kūren related to Swedish kura to lie in wait, Danish kure to squat]cow•er
(ˈkaʊ ər)
to crouch or shrink back, as in fear or shame.
[;1300; Middle English couren & Middle Low German kūren]
cow′er•ing•ly, adv.
cowerPast participle: coweredGerund: coweringImperativePresentPreteritePresent ContinuousPresent PerfectPast ContinuousPast PerfectFutureFuture PerfectFuture ContinuousPresent Perfect ContinuousFuture Perfect ContinuousPast Perfect ContinuousConditionalPast ConditionalImperativecowercowerPresentI coweryou cowerhe/she/it cowerswe coweryou cowerthey cowerPreteriteI coweredyou coweredhe/she/it coweredwe coweredyou coweredthey coweredPresent ContinuousI am coweringyou are coweringhe/she/it is coweringwe are coweringyou are coweringthey are coweringPresent PerfectI have coweredyou have coweredhe/she/it has coweredwe have coweredyou have coweredthey have coweredPast ContinuousI was coweringyou were coweringhe/she/it was coweringwe were coweringyou were coweringthey were coweringPast PerfectI had coweredyou had coweredhe/she/it had coweredwe had coweredyou had coweredthey had coweredFutureI will coweryou will cowerhe/she/it will cowerwe will coweryou will cowerthey will cowerFuture PerfectI will have coweredyou will have coweredhe/she/it will have coweredwe will have coweredyou will have coweredthey will have coweredFuture ContinuousI will be coweringyou will be coweringhe/she/it will be coweringwe will be coweringyou will be coweringthey will be coweringPresent Perfect ContinuousI have been coweringyou have been coweringhe/she/it has been coweringwe have been coweringyou have been coweringthey have been coweringFuture Perfect ContinuousI will have been coweringyou will have been coweringhe/she/it will have been coweringwe will have been coweringyou will have been coweringthey will have been coweringPast Perfect ContinuousI had been coweringyou had been coweringhe/she/it had been coweringwe had been coweringyou had been coweringthey had been coweringConditionalI would coweryou would cowerhe/she/it would cowerwe would coweryou would cowerthey would cowerPast ConditionalI would have coweredyou would have coweredhe/she/it would have coweredwe would have coweredyou would have coweredthey would have cowered
Switch to Verb1.cower - "They huddled outside in the rain", , ,
- bend one's back forward fr "he crouched down"; "She bowed before the Queen"; "The young man stooped to pick up the girl's purse"2.cower - show submission or fear, , , , ,
- "The stick does not bend"cowerverb , , , , , , ,
The hostages cowered in their seats.
cower [ˈkaʊəʳ] VI →
(de miedo)the servants were cowering in a corner → los
se habían
en un cower [ˈkaʊər] vi (= crouch) → cower vi → sich ; (squatting) → ; to cower before somebody →
; he stood cowering in a corner → er
in einer ; the cowering peasants → die geduckten cower [ˈkaʊəʳ] vi →
(per paura)cower ('kau?)
verb to draw back and crouch in fear. He was cowering away from the fierce dog. terugdeins
???????? ?? ??????
треперя (от страх)
encolher-se
krybe sammen
ζαρ?νω απ? φ?βο ; ;
küüru t?mbudes taanduma
?? ??? ??? ?? ??? ????
???????????? ????????
????? ?? ???? ????
mundur ketakutan
hnipra sig saman
trauktis susigū?us
sarauties (no bailēm)
?? ???? ??? ??? ???????
encolher-se
a se piti, a se ghemui
съёживаться
potuhniti se
??u?uriti se
krypa ihop, huka sig
???????????????????
yere ??kmek
зщулюватися
??? ?? ??? ??? ????? ?? ????
ng?i co rúm l?i
encongir-se, empetitir-se, apocar-se
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They could feel the cold as it crept in through the cracks, reaching out for them with its icy, death- and they would crouch and cower, and try to hide from it, all in vain. I felt a mighty power fly along my arm, and it was without surprise that I saw the monster cower back before a similar movement made spontaneously by each one of us. As eagle-beaked, crook-taloned vultures from the mountains swoop down on the smaller birds that cower in flocks upon the ground, and kill them, for they cannot either fight or fly, and lookers on enjoy the sport--even so did Ulysses and his men fall upon the suitors and smite them on every side. The kite was shap and the moment it rose into the air the birds began to cower and seek protection--and then to disappear. Then she ran in terror to cower in her cell, asking of her pallet some less terrible nightmare. He spoke with a firmness which was very gentle, and yet he could see that Bulstrode seemed to cower under that gentleness, his face looking dried and his eyes swerving away from the glance which rested on him. The result was a sharp peck on the end of his nose that made him cower down and ki-yi. Meagre old chairs and tables, of spare and bony make, and hard and cold as misers' hearts, were ranged, in grim array, agai attenuated presses, grown lank and lantern-jawed in guarding the treasures they enclosed, and tottering, as though from constant fear and dread of thieves, shrunk up in dark corners, whence they cast no shadows on the ground, and seemed to hide and cower from observation. While he, subdued and abashed, seemed to crouch before her, and to shrink and cower down, as if in the presence of some superior creature, the child herself was sensible of a new feeling within her, which elevated her nature, and inspired her with an energy and confidence she had never known. A man who bestrides a horse must be essentially different from a man who cowers in a canoe. LAZIO stars had to cower in their dressing-room at training last week as furious fans rioted outside.But when Houston police burst into the home of his friend John Geddes Lawrence in September 1998 and arrested the two men for having sex (then illegal under state law), Garner did not cower in retreat.
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