音标:[ˈtu:kænz] ;
n. 巨嘴鸟, 犀鸟( toucan的复数形式 )
n. brilliantly colored arboreal fruit-eating bird of tropical America having a very large thin-walled beak

The toucan's long bill has long perplexed biologists. Darwin theorized that it attracted mates. Other suggested uses ranged from fruit peeling to territorial defense. But a report in the July 24th issue of the journal Science offers another explanati

发表于:2018-12-24 / 阅读(63) / 评论(0) 分类 Scientific American(七)月

Big Bill Chill When people get hot, we sweat. When dogs overheat, they pant. And birds? At least one typethe Toco toucanuses its oversized bill to cool down. Even if youre never seen a live toucan up close, you might be able to picture its huge, mult

发表于:2018-12-27 / 阅读(56) / 评论(0) 分类 英语时差8,16

Our next destination could easily be described as a piece of paradise-- Costa Rica. It is a favorite get-away for both eco-trekkers and the surf set. Now if you are looking to enjoy a bit of the good life, for as they say Costa Rica, la Puda Vida, th

发表于:2019-01-22 / 阅读(40) / 评论(0) 分类 自然百科2010年
学英语单词
-penem
a-j
acknowledgement receipt
aeneous
air structure
Akraós
al maaniyah
arc incision
baldacchin
barring motor
Bartlett, John
beta-lactam
bucket hats
butch clover
Cengio
centrifuge dewaxing
chiu chao
closer reel
coldness index
conquerors
converting pipe
copper isotope
curl-paper
DAV
delayed automatic gain control (dagc)
diffuse villi
divided job processing
dorsopalmar
dropseed
dull sound
duquesnel
electric fence
electrocorticograms
endles belt peener
epidermal inclusion cyst
Epipactis ohwii
forced discharging
frown
fuel processing
FXA
genus Coelophysis
Glossa, Cape
granular cell type ameloblastoma
hamanatto
hexacontium axotrias
hylomorphic
implicit smoothing
index disc
intraurban
laures
layth
Ligularia schmidtii
lime-soda process
lithium chloride resistance hygrometer
Loginova, Guba
lyff
margin
marry in haste, repent at leisure
mcgillvray
micron ultra shifter
money clip
Monjes del Este, Is.
multicrastinating
multiple-keys
multiple-motor
multistorey catalytic reactor
nicknack
Nuculana
ogonyoks
omom
opticroms
other prepayments
overcup oaks
paraleucobryum formosanum
passive devices
pedicle of spleen
perfuming
perisclerium
Perrin Air Force Base
phosphoglycerokinase
plunger displacement
praso-
preliminary flightrating test,PFRT
pylos
reactance synchronizing method
recklessness
rood goose
Ruff-Fenton degradation of sugars
Sarufutu-gawa
semitransparency
session level
shifter collar
small pair boat
sparteines
standard metropolitan statistical area
standard of feasibility
sternbergia
undercanopy
underpraises
Vomano, Fiume
west indiess