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(60) / 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(52) / 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(38) / 评论(0) 分类 自然百科2010年
学英语单词
abustles
afibrinogenaemic
albomycetin
arranged marriage
BFUP
cappa
chain home beamed
chalutzim
chronicle of school
citrus leaf-miner
cowboy economy
data longevity
decentralized stochastic control
Dewi, Saint
differencing
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drafts
Duncan I.
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import cargoes
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Kuibyshev
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Laves' phases
lecointre
left inverse element
Leg-Over
length of boss
Lermontov, MikhailYurievich
Linda Vista
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liquid nitrogen freezing system
liquor tyrothricini
load-deflection relation
looked after
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Mary Cassatt
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Panxworth
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Periptychus
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point probe-dynamic characteristic method
police judge
potyvirus konjak mosaic virus
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ramus ilicus
real-time application
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right-to-left rule
rotto
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see ... off
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Shubat Enlil
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supplementary appropriation
Telotremata
texting codes
the bitter truth
the dogs of war
trichosurus vulpeculas
tubb
unholding
view(in computer graphics)
walking orders
X-ray fluorescences