Algae naturally produce oil, when its process start with oil turned into bio fuels, an alternative energy source. This is just one snag. Harvesting the oil from algae-float water is prohibitively expensive. But researchers have come up with an effort

发表于:2018-12-24 / 阅读(41) / 评论(0) 分类 Scientific American(一)月

Broadcast: May 12, 2003 By Jill Moss This is the VOA Special English Development Report. Each year, millions of people in Bangladesh drink ground water that has been polluted by naturally high levels

发表于:2019-01-02 / 阅读(67) / 评论(0) 分类 VOA2003(上)-社会广角

The local food movement is growing in the United States. Restaurant owners and families look to nearby farms for fruits, vegetables and meat. Now small forest owners want to join the local food party. They're promoting edible mushrooms, berries, and

发表于:2019-01-13 / 阅读(38) / 评论(0) 分类 VOA标准英语2010年(十二)月

AILSA CHANG, HOST: Sea salt has been harvested for more than a thousand years on the Atlantic coast of France. The industry declined in the mid-20th century. But with foodies looking for ever-fancier ingredients, NPR's Eleanor Beardsley reports the s

发表于:2019-01-16 / 阅读(38) / 评论(0) 分类 2017年NPR美国国家公共电台8月

Huang Jiefu, director of the China Organ Transplant Development Foundation, has told an international symposium on transplants in Hong Kong that persistent reports of organ harvesting taking place in China are simply not true. The rumor about organ h

发表于:2019-01-19 / 阅读(45) / 评论(0) 分类 2016CRI中国国际广播电台

In modern times, most people choose to use electrical devices, like refrigerators, to keep drinks cool. But summer visitors at Rockywold-Deephaven Camps in New Hampshire cool their drinks the old-fashioned way - using large blocks of ice in wooden bo

发表于:2019-02-19 / 阅读(38) / 评论(0) 分类 2019年VOA慢速英语(二)月