音标:[te'træmәrәs] ;
a. 四部分的, 四跗节的, 四个一组的, 四重的, 四复的
s. having or consisting of four similar parts; tetramerous flowers

By Nick Wadhams Nairobi 26 July 2007 Four rare mountain gorillas have been killed after gunmen crept up on them and opened fire in the Democratic Republic of Congo's Virunga National Park. Nick Wadhams has more on the story from Nairobi. The gorillas

发表于:2018-12-08 / 阅读(355) / 评论(0) 分类 2007年VOA标准英语(七月)

This is Scientific American Sixty Seconds Science, I'm Sophie Bushwick, got a minute? When Mexican tetra fish moved into darker caves long ago, they evolved to deal with the dark by becoming albino and going blind. A new research shows that the chang

发表于:2018-12-24 / 阅读(394) / 评论(0) 分类 Scientific American(一)月

T Tanshinone IIA 丹参酮IIA Tanshinone I 丹参酮I Tanshinone IIB 丹参酮IIB Taraxasterol 蒲公英甾醇 Taraxerol 蒲公英赛醇 Tauro ursodesoxy cholic acid 牛磺熊去氧胆酸 Taxifolin 花旗

发表于:2019-01-03 / 阅读(394) / 评论(0) 分类 医务英语

10 Getting The Lead Out 第十章 把铅撵出去 In the late 1940s, a graduate student at the University of Chicago named Clair Patterson (who was, first name notwithstanding, an Iowa farm boy by origin) was using a new method of lead isotope measur

发表于:2019-02-17 / 阅读(418) / 评论(0) 分类 万物简史
学英语单词
-art
acenesthsia
aggenerations
alpha geminorums
anticinema
antiknock-fuel
apparent rotation
at sb's heels
audiosurgery
backscattering spectrometry
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by-lane
Carnot efficiency
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external wirint diagram
gaging member
gamma acid
gleere
Gol Tappeh
hair-erected muscle
hand controlled grass cutter
hybrid modular redundant system
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inchant
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long-day insect
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NANA
nontemperate
oligopithecid
one-hundredths
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propantheline(bromide)
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pyreto-
RDWS
reacton
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Russer Bank
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semantic dictionary
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sparrow-bill
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