次甲霉素

'Benito Cereno,' by Herman Melville, Part One

Captain Benito Cereno hurried aboard his ship. It was ready to sail. A bright sun and a soft breeze promised good weather ahead. The ship's anchor was raised. And the San Dominick -- old but still seaworthy - moved slowly out of the harbor of Valpara

发表于:2018-12-08 / 阅读(758) / 评论(0)

2017年VOA慢速英语(十一)月

SSS 2011-06-22

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Saliva contains many useful components: lubricants, enzymes for breaking down food and now compounds that can reveal a persons age. Thats according to a

发表于:2018-12-24 / 阅读(80) / 评论(0)

Scientific American(六)月

SSS 2010-03-23

Ever get a sour stomach after your morning coffee? Well, you might end up switching to a dark roastbecause that coffee concoction may leave you with a happier tummy. That's according to the research presented at the American Chemical Society meeting

发表于:2018-12-24 / 阅读(82) / 评论(0)

Scientific American(三)月

"Ich bin ein Berliner"

I am proud to come to this city as the guest of your distinguished Mayor, who has symbolized throughout the world the fighting spirit of West Berlin. And I am proud -- And I am proud to visit the Federal Republic with your distinguished Chancellor w

发表于:2018-12-30 / 阅读(348) / 评论(0)

名人演讲

'Benito Cereno,' by Herman Melville, Part Two

We present the second of three parts of the short story Benito Cereno. It was written by Herman Melville. Last week, we told how African slaves on a Spanish ship rebelled in seventeen ninety-nine. They killed most of the Spanish sailors. Only the cap

发表于:2019-01-02 / 阅读(287) / 评论(0)

2017年VOA慢速英语(十二)月

'Benito Cereno,' by Herman Melville, Part Three

We present the last of three parts of the short story Benito Cereno. It was written by Herman Melville. As we told you in earlier parts of our story, rebel slaves seized the ship San Dominick off the coast of Chile. They killed many of its officers a

发表于:2019-01-03 / 阅读(675) / 评论(0)

2017年VOA慢速英语(十二)月

VOA慢速英语2018--'Benito Cereno,' by Herman Melville, Part Two

发表于:2019-01-03 / 阅读(83) / 评论(0)

2018年VOA慢速英语(十)月

AGRICULTURE REPORT - Restrictions on Methyl Bromide

AGRICULTURE REPORT - Restrictions on Methyl Bromide By Mario Ritter Broadcast: Tuesday, March 16, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Graphic Image Some chemicals

发表于:2019-01-06 / 阅读(101) / 评论(0)

农业与发展

2006年VOA标准英语-Saddam Hussein Genocide Trial Resumes

By Benjamin Sand Irbil, Iraq 17 October 2006 Saddam Hussein adjusts his headphones as he listens to witness testimony during his trial in Baghdad's heavily fortified Green Zone, October 17, 2006 The genocide trial of former Iraqi leader Saddam Husse

发表于:2019-01-09 / 阅读(99) / 评论(0)

2006年VOA标准英语（十月）

经济学人69:外因遗传与压力新生儿蓝调曲

Science and Technology Epigenetics and stress Baby blues 科技外因遗传与压力新生儿蓝调曲 A mother's stress while she is pregnant can have a long-lasting effect on her children's genes 母亲孕期压力过大会对孩子的基因造成长

发表于:2019-01-26 / 阅读(73) / 评论(0)

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