渐开线接触比;渐开线重叠系数

数学英语 26 What is the Golden Ratio

图片 by Jason Marshall Some math is functional. Some math is fun. And some math is simply stunning. If that last description sounds improbable to you, then today just might change your mind. Because now that weve covered enough ground, were going t

发表于:2019-01-02 / 阅读(124) / 评论(0)

数学英语

数学英语 14 How to Use the Golden Ratio

图片1 图片2 by Jason Marshall Despite many peoples assumption to the contrary, math is undeniably artistic. It takes a tremendous amount of creative muscle and artistry to devise mathematical solutions. And, as made evident by their frequent batt

发表于:2019-01-02 / 阅读(139) / 评论(0)

数学英语

Alien contact

Rob: Hello! Im Rob and this is 6 Minute English. Im joined today byAlice. Hello Alice. Alice: Hi Rob. Rob: Today, were talking about alien life form and who on planet earth wouldaliens speak to if they one day made contact? Alice: Alien life form. Th

发表于:2019-01-07 / 阅读(199) / 评论(0)

六分钟英语

雅思阅读中的文法结构剖析

1. The work that Tim Pons and his colleagues published last week is basic research into the portion of the brain, the cortex, that one scientist says is responsible for all the interesting things we do. 剖析：在这个长句中, 共有两个定语从

发表于:2019-01-17 / 阅读(87) / 评论(0)

雅思英语

China cuts its reserve ratio again

BEIJING, May 13 (Xinhuanet) - China's central bank announced on Saturday it would lower the reserve requirement for commercial lenders by 50 basis points, the second time it has taken such action this year to inject more market liquidity and shore up

发表于:2019-02-04 / 阅读(84) / 评论(0)

英语新闻

英闻天下——331 China's Unbalanced Sex Ratio and its Ripple Effect

China's sex ratio is quite worrying nowadays. According to census data, China's sex ratio at birth was 108 males to every 100 females in the early 1980s, only slightly above the natural rate of 103 to 107. In 2000 the ratio was 116.9 males to 100 fem

发表于:2019-02-14 / 阅读(74) / 评论(0)

英闻天下

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a-store

abnormal hemoglobin test

amino guanidyl valeric acid

anastomoses

angularvelocity

atmospheric boiling pan

Avoca R.