亚油精

SSS 2011-12-29

nobody likes getting shots, but what if you could make the needles so tiny that they broke skin painlessly. engineers from top university have created such micro needles, made from major protein in silk, fibrolin. the work is in the journal of advanc

发表于:2018-12-02 / 阅读(67) / 评论(0)

Scientific American(十二)月

VOA慢速英语--Which Is Better for Your Career: Specializing or Generalizing?

From VOA Learning English, this is the Health Lifestyle report. When trying to make a successful career, which is better: being a generalist or a specialist? In other words, should you generalize and know a little about a lot of things? Or should you

发表于:2018-12-08 / 阅读(43) / 评论(0)

2018年VOA慢速英语(十)月

文身会让你失去工作么?

Could a Tattoo Cost You a Job? 文身会让你失去工作么? In the 1960s U.S., a tattoo was usually a sign of anti-social or illegal activity. Few people had them. Today, at least one in five Americans has a tattoo, including sports stars, actors

发表于:2018-12-16 / 阅读(57) / 评论(0)

2015年VOA慢速英语(六)月

EXPLORATIONS - George Catlin, Part 2

EXPLORATIONS - October 9, 2002: George Catlin, Part 2 By Paul Thompson VOICE ONE: This is Mary Tillotson. VOICE TWO: And this is Steve Ember with the Special English program EXPLORATIONS. Today we pre

发表于:2019-01-02 / 阅读(68) / 评论(0)

Explorations

EXPLORATIONS - George Catlin, Part 1

By Paul Thompson VOICE ONE: This is Mary Tillotson. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. A new exhibit of paintings is being shown at the Smithsonian A

发表于:2019-01-02 / 阅读(69) / 评论(0)

Explorations

Chen Ruolin wins women's 10m platform gold at london Olympic Games

LONDON, Aug. 9 (Xinhua) -- Chen Ruolin collected a high 422.30 points for the title of women's 10m platform diving at London Olympic Games on Thursday. It is the 200th gold medal China won from all the summer Olympic Games it participated in. Brittan

发表于:2019-02-07 / 阅读(48) / 评论(0)

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2'-deoxythymidine

4-amino-3-isoxazolidone

airship envelope fabric