[医] 解砷毒剂

Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is abo

发表于:2018-12-01 / 阅读(141) / 评论(0) 分类 新东方背诵文选

By David McAlary U.S. astronomers have made a finding they say increases the chance that distant stars may harbor planetary systems like our own. They have discovered two planets the size of Neptune e

发表于:2019-01-03 / 阅读(57) / 评论(0) 分类 VOA2004(下)--健康科技

Human Waste Killing Caribbean Coral In the first documented case of a human pathogen infecting a marine species, U.S. scientists say a bacterium in untreated human sewage is killing coral along the Florida coast and in the Caribbean Sea. The finding

发表于:2019-01-11 / 阅读(48) / 评论(0) 分类 VOA标准英语2011年(八月)

An international team of researchers looking for the cause of severe bacterial epidemics has deciphered the genome of group A streptococcus, a normally harmless sore throat pathogen that occasionally turns deadly. Experts say the breakthrough could s

发表于:2019-01-13 / 阅读(81) / 评论(0) 分类 VOA标准英语2010年(一月)

There is a curse that has plagued humanity since ancient times. 从古代起就有一种诅咒一直让人类饱受折磨。 The Greeks fought it by chewing aromatic resins, while the Chinese resorted to egg shells. 古希腊人通过咀嚼芳香树脂

发表于:2019-01-17 / 阅读(44) / 评论(0) 分类 TED演讲教育篇

本期内容: American scientists announced that they had cloned the Zika virus. This is an important stage in producing a safe version of the pathogen to be used in a vaccine against the mosquito-borne illness, which has been linked to brain defor

发表于:2019-03-02 / 阅读(94) / 评论(0) 分类 夏说英语新闻晨读