无效信元

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

一般过去时的用法

1）在确定的过去时间里所发生的动作或存在的状态。时间状语有：yesterday, last week, an hour ago, the other day, in 1982等。 Where did you go just now? 2）表示在过去一段时间内，经常性或习惯性的动作。

发表于:2019-02-03 / 阅读(28) / 评论(0)

英文语法词汇

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(120) / 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

学个词 Learn a Word-VOA英语教学 2962 invalid

今天我们要学的词是 invalid. Invalid 形容词，无效的。South Africa's High Court ruled that President Jacob Zuma's appointment of a state prosecutor was invalid. 南非最高法院裁决，南非总统祖马对一名政府检察官的任命

发表于:2019-02-16 / 阅读(73) / 评论(0)

英语单词荟萃

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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学英语单词

Abdolabad

accredition

Achakèn

amino acid additive(s)

arteriola et venula nasalis retin? inferior