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(66) / 评论(0) 分类 Scientific American(三)月

Murchison Meteorite's Chemical Bonanza The 1969 Murchison meteorite was known to harbor complex organic compounds, but a new analysis in Proceedings of the National Academy of Sciences finds that it may also contain millions of chemicals and shed lig

发表于:2019-01-02 / 阅读(94) / 评论(0) 分类 60秒科学

Stomach Cells Happier with Dark Roast Coffee 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 research presented

发表于:2019-01-02 / 阅读(94) / 评论(0) 分类 60秒科学

Agriculture report - Project in DRC Aims to Increase Fertilizer Use This is the VOA Special English Agriculture report. North Kivu is a war-torn province that used to be called the breadbasket of the Congo. Now, some farmers are being trained to incr

发表于:2019-01-12 / 阅读(59) / 评论(0) 分类 2012年VOA慢速英语(八)月

98 percent of the country's forests have been cut down Steve Baragona | Petit Guave, Haiti 22 April 2010 Restoring Haiti's hillsides with contour canals, vetiver grass, and trees Edgar Griffin has lived on this hillside outside the town of Petit Guav

发表于:2019-01-13 / 阅读(41) / 评论(0) 分类 VOA标准英语2010年(四)月

Katia: So, Enam, let's talk about environmental problems of our countries. In Bangladesh, what is an environmental problem? Enam: Actually, we have a lot of environmental problems in Bangladesh but mainly I'd say the soil contamination is quite bad,

发表于:2019-02-05 / 阅读(58) / 评论(0) 分类 原版英语对话1000个