[化] 氯甲酸对溴代苄酯

奥巴马演讲视频：Working Together to Create Jobs

I'm here in Detroit visiting workers at a GM plant in the heart of a resurgent American auto industry. And I brought a guest with me President Lee of South Korea. We're here because this week, Congress passed landmark trade agreements with countries

发表于:2018-12-18 / 阅读(42) / 评论(0)

美国总统演讲视频

VOA慢速英语2013 AS IT IS 2013-06-09 Afghan Fashion Designer Creates Dresses, Jobs

AS IT IS 2013-06-09 Afghan Fashion Designer Creates Dresses, Jobs Thanks for joining us again on As It Is. Im Kelly Jean Kelly. Today we are discussing one of my favorite topics: wedding dresses. Last year I made a beautiful huge ball gown for a lady

发表于:2019-01-12 / 阅读(29) / 评论(0)

2013年VOA慢速英语(六)月

2006年VOA标准英语-Aging Chernobyl Survivors Share Memories o

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2006年VOA标准英语（四月）

2006年VOA标准英语-Bob Dylan Comes Back With "Modern Times"

By Katherine Cole Washington 17 September 2006 Bob Dylan is one of the world's most-acclaimed songwriters and performers. Over the past five decades, he's sold close to 100-million records, and has performed thousands of shows all around the world.

发表于:2019-01-20 / 阅读(106) / 评论(0)

2006年VOA标准英语（九月）

Chernobyl Accident Anniversary Recalled

Pripyat, Ukraine. A dead city. Homes, schoolrooms, playgrounds, and other places are crumbling as wild nature reclaims the land. Pripyat once had some 50,000 residents（居民） . Now they are gone, perhaps forever. Only the artifacts of their live

发表于:2019-02-06 / 阅读(52) / 评论(0)

英语新闻

夏说英语新闻晨读第499期:兔子与绿萝杂交

本期内容： A humble houseplant with a dash of rabbit DNA could help lower our exposure to indoor air pollution, new research suggests. Scientists have revealed that by inserting a rabbit gene into devils ivy the plant is able to clean the surrou

发表于:2019-02-20 / 阅读(50) / 评论(0)

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atom trapping technique

ballet positions

Berberis aquifolium Nutt.

chlorobiumchlorophyll bacterioviridin