Asthma by John Russell With World Health day on 7th April, this week we take a closer look at a very common health problem. Does your chest regularly feel tight? Do you find it difficult to breathe after light exercise? Do you sometimes make a wheezi

发表于:2019-01-02 / 阅读(149) / 评论(0) 分类 英语音频杂志

Vaccine - a planned exposure to an antigen in order that memory B lymphocytes can retain a memory for it. In practice the organism carrying the antigen is either killed or modified so that it does not

发表于:2019-01-03 / 阅读(198) / 评论(0) 分类 医务英语

RACHEL MARTIN, HOST: It is tick season, and with it comes the risk of Lyme disease. Once found mainly in New England, Lyme disease is now being reported in a much wider range of the U.S. NPR's Allison Aubrey reports that cases have more than doubled

发表于:2019-01-16 / 阅读(77) / 评论(0) 分类 2018年NPR美国国家公共电台5月

文本: So Skara Brae was not just an isolatedsettlement of fishers and farmers. Its people must have belonged to some largersociety, one sophisticated enough to mobilise the army of toilers and craftsmenneeded, not just to make these monuments, bu

发表于:2019-01-21 / 阅读(52) / 评论(0) 分类 跟着英剧练发音

1. Libya officials say the US ambassador Chris Stevens has been killed along with three other Americans in an attack on the US consulate in Benghazi. The consulate was burned down by Muslim protesters' angry about a film that ridicules the Prophet Mu

发表于:2019-02-11 / 阅读(90) / 评论(0) 分类 美联社新闻一分钟2012(九月)

Don: [WHISTLING A BIRDSONG-LIKE TUNE] Ya?l: Nice tune Don, but can you whistle with your tail like an Anna's hummingbird? D: Hummingbirds can whistle with their tails? Y: Male Anna's hummingbirds, which live along the west coast of North America, can

发表于:2019-03-06 / 阅读(93) / 评论(0) 分类 英语时差8,16