铒镱光纤

疯狂英语口语绝招巧问妙答

Oh ,let me think for a moment . [00:03.79]噢，让我想一会儿。 [00:07.58]I haven't a clue ,I 'm afraid. [00:12.15]我没有线索，很抱歉。 [00:16.72]I'm not really sure ,sorry . [00:20.87]我真说不准。对不起。 [00:25.03]I'm terr

发表于:2018-11-28 / 阅读(97) / 评论(0)

零距离李阳疯狂英语口语

科学美国人60秒 SSS High Fiber Diet Keeps Intestinal Walls Intact

Your nose may be the first place you think of as a source of mucus. But mucus is a major player in your gut, too. There's antimicrobial peptides and proteins that are present in there. Bacteria live in there and forage on the carbohydrates. And it's

发表于:2018-12-24 / 阅读(49) / 评论(0)

2016年Scientific American(十一)月

SSS 2009-08-12

Youve given some thought to oxygen, carbon, uranium. But youve probably never mused about the element ytterbium, symbol Yb. A new study by scientists at the National Institute of Standards and Technology, or NIST, says that ytterbium could find a rol

发表于:2019-01-08 / 阅读(49) / 评论(0)

Scientific American(八)月

2007年VOA标准英语-Study Shows High Fiber Diet Not More Helpful Fi

By Melinda Smith Washington 18 July 2007 We are going to find out about two studies on breast cancer. One studied whether a diet very high in fiber and low in fat could reduce the risk of recurring breast cancer. Another study focused on women with a

发表于:2019-01-12 / 阅读(90) / 评论(0)

2007年VOA标准英语（七月）

美国国家公共电台 NPR The FDA Will Decide Whether 26 Ingredients Count As Fiber

RACHEL MARTIN, HOST: The Food and Drug Administration is set to decide soon on a matter that could help you rethink fiber. Yeah, we're talking about fiber. We're told to eat a whole lot more of it. It's good for us, right? But what exactly counts as

发表于:2019-01-16 / 阅读(59) / 评论(0)

2017年NPR美国国家公共电台10月

背单词运用地理学知识强化记忆

Ytterby 瑞典小镇伊特比 yttrium 钇 (1794) erbium 铒 (1842) terbium 铽 (1842) ytterium 镱 (1907) 1794年在瑞典小镇伊特比的黑石中发现了化学元素钇，决定用 Ytterby命名该元素：yttrium。1842 年在该镇的黑石中发

发表于:2019-02-18 / 阅读(38) / 评论(0)

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4-dimensional

agirwat hills

apazone

Arndt-Eistert synthesis

aromatizes

berberis morrisonesis