甲基纤维素

Fuel Cell Cost-Cutting

By Caty Weaver Broadcast: July 25, 2003 This is Bill White with the VOA Special English Environment Report. Researchers say they have found a way to reduce the cost of some 1)fuel cell production. The

发表于:2018-12-01 / 阅读(104) / 评论(0)

VOA2003（下）-环境与健康

国家地理-2008-05-24 Fuel Cell 聚焦燃料电池

For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after yea

发表于:2018-12-30 / 阅读(59) / 评论(0)

国家地理2008年

VOA常速英语2007-New York's Metropolitan Museum Opens New Educati

By Victoria Cavaliere New York 24 October 2007 New York's Metropolitan Museum of Art has opened a newly renovated, state-of-the-art education center that will allow students, scholars and the general public to study the museum's world-renown collecti

发表于:2019-01-31 / 阅读(55) / 评论(0)

2007年VOA常速英语（十月）

Researchers make sperm from stem cell in dish

WASHINGTON, Aug. 4 (Xinhua) -- Researchers have found a way to turn mouse embryonic stem cells into sperm and this finding opens up new avenues for infertility research and treatment, according to astudy published Thursday in the online edition of jo

发表于:2019-02-04 / 阅读(119) / 评论(0)

英语新闻

Turn Off Your Cell Phone 关掉你的手机

Turn Off Your Cell Phone 关掉你的手机 We went to the movie the other night. I sat in an aisle seat as I usually do, because it feels a little roomier. Just as the feature was about to start, a blonde from the center of the row got up and starte

发表于:2019-02-07 / 阅读(163) / 评论(0)

趣味英语

U.S. researchers discover human lung stem cell

WASHINGTON, May 11 (Xinhua) -- Researchers at Brigham and Women 's Hospital (BWH), a teaching affiliate of Harvard Medical School, have identified(鉴定) a human lung stem cell that is self-renewing and capable of forming and integrating multiple bi

发表于:2019-02-18 / 阅读(119) / 评论(0)

英语新闻

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antifungal preparation

ball-and-socket bearing