时间:2019-02-16 作者:英语课 分类:英语听力文摘 English Digest


英语课

Snake Vision


Snakes have heat-vision that allows them to catch their dinners in the dark. True or false?


True! It isn’t quite right to call it “vision,” though–more accurate would be to say that certain species, such as rattlers, have pits just under their eyes that contain specialized heat-sensing organs.


This ability to spot heat comes in handy in the desert, especially if you’re out looking for a quick-moving mouse to make into a snack and there isn’t enough light to see by. Rattlers are amazingly good at catching 1 prey 2 because of their heat-seeking ability.


New studies have actually shown that the same sense organs are used for seeking cold as well. This is just as important when you live in a desert; overheating is always a possibility. Two researchers at Indiana State University in Terre Haute found this out by covering some rattlers’ facial pits with little plastic balls temporarily glued in place.


With these organsblocked, the rattlers were no better at finding the cool spot in a maze than if they had been moving around by chance. They were “cool-blind.” Take the balls out and the rattlers quickly found their way to the cooler spot. Their thermal 3 vision, so to speak, had been restored.


Now researchers debate this, but it’s possible that the ability to find a cool spot in a desert actually came first, in terms of evolutionary 4 history. Get that, and the ability to snag a hot mouse might come as a tasty bonus.





蛇的视力


蛇靠着它们的“热视力”能力来在夜晚捕捉猎物。是对还是错?


答案当然是正确的!但是把蛇的这种能力说成是“视力”好像不是很准确。更准确地说,应该是某些蛇类,如响尾蛇,在它们眼睛的下面部位有专门的呈凹陷状的热感应器官——颊窝。


在沙漠当中,蛇的这一能力可谓是方便之极。特别是当蛇在周围光线不足的情况下,想要抓只小老鼠当点心的时候,更能体现其方便之处。响尾蛇是响当当的捕猎好手,当然,这基本上是得益于它的热感应能力。


新的研究表明,颊窝还可以用来做冷感应器。生活在沙漠中,找出较凉爽的地方也是很重要的;毕竟,在沙漠中过热现象是家常便饭。两名印第安纳州立大学的研究人员在Terre Haute得出了这一结论。他们暂时用胶水把塑料小球固定在一些响尾蛇的颊窝上,以此将它们的颊窝堵住。


在颊窝被堵住的情况下,响尾蛇便无法从一个迷宫中找出“温度较低的地方”,相比,它只会在四处乱转。此时此刻的它们是“冷盲”。取出小塑料球,响尾蛇便能迅速地找出较冷的地方。也可以说是,他们的热视力已经恢复了。


目前,科学家们正就此展开讨论。但是,从演化历史来看,凭借这一能力在沙漠中找到一个较凉爽的地方确实是至关重要的。满足这一点之后,再靠热感应能力去抓一只活生生的老鼠也算是美味的奖励啦。




 



adj.易传染的,有魅力的,迷人的,接住
  • There are those who think eczema is catching.有人就是认为湿疹会传染。
  • Enthusiasm is very catching.热情非常富有感染力。
n.被掠食者,牺牲者,掠食;v.捕食,掠夺,折磨
  • Stronger animals prey on weaker ones.弱肉强食。
  • The lion was hunting for its prey.狮子在寻找猎物。
adj.热的,由热造成的;保暖的
  • They will build another thermal power station.他们要另外建一座热能发电站。
  • Volcanic activity has created thermal springs and boiling mud pools.火山活动产生了温泉和沸腾的泥浆池。
adj.进化的;演化的,演变的;[生]进化论的
  • Life has its own evolutionary process.生命有其自身的进化过程。
  • These are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。
学英语单词
A to Zs
adeva
agoes
anarrow
attachable
automatic hatch cover
base line of diagram
Bragg-Gray cavity principle
cardiac effusion
catching ghost
christ-spirit
colpopoiesis
copy hyperlink
crawlers
derailing position
Dracocephalum purdomii
dry container
dungkhag
embare
erigonum fasciculatums
ethnic nationalism
facemask
filler frame
flow line arch
fluences
fusings
gastrokinesograph
generator for data structure
genus Uintatherium
hampe
herb-wife
highball glass
Hope Shale
hosannaing
ileectomies
inertia clutch
inlay wax
interchondral joints
kayl
laryngometer
law of constant return
levante
lime-sulphur
limiting law
liquid-vapour chemical reaction
local batch mode
lost sight of
Lubuskie, Pojezierze
magnet, bar
metal drum
microliters
Mission Hills
negotiating bank
ornitho-
photorefractory
plantlives
printer unoperable state
proctologies
programming matrix
push-type sprayer
pyranylidene
quinine hydrochlorsulfate
reclusive
recomputability
relevant parties
rigging-angle cone
road traffic accident
romanzoffiana
romps
round-of symbol
run-of-the-
s-tetrazine
satellite retroreflector
seaborne machinery
showed out
sig quote
Simindou
simultaneous event
soil ribbon
Space Book
sprig bolt
steel pretreatment
stepanakert
swim fin
technical-support
tess
theory of rings
thread cutting tools
Thurso Bay
Tic coated tip
transend
typhula incarnata lasch.
ulocladium consortiale
un american
unobscurable
V-notch charpy specimen
vallew
venturia rhododendri
voltaic photo-detector
wave cutter
Western Abnaki
wissmanns