Sickle cell disease is a blood disorder due to a single genetic mutation. It remains in populations because the mutation has a flip sideit helps to protect against malaria. Now another mutation has been shown to afford similar protection. Deficiency

发表于:2018-12-24 / 阅读(47) / 评论(0) 分类 Scientific American(十二)月

fart vi. 放屁 intestinal adj. 肠的 digestive adj. 消化的 obsessive-compulsive 强迫观念与行为的 squeeze v. 挤压 mosquito n. 蚊子 If you hold in a fart, where does it go? 憋住的屁去哪儿了? According to Baidu, it exits out t

发表于:2019-01-10 / 阅读(31) / 评论(0) 分类 早安英文

SCIENCE IN THE NEWS - Discovery That Stored Blood Loses a Life-Saving Gas Could Solve Mystery By Lawan Davis, Soo Jee Han and Caty Weaver / Broadcast: Mon, 12 Nov 2007 16:00:00 UTC VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm S

发表于:2019-01-11 / 阅读(82) / 评论(0) 分类 VOA慢速英语2007年(十一)月

CHRISTOPHER CRUISE: This is SCIENCE IN THE NEWS in VOA Special English. Im Christopher Cruise. FAITH LAPIDUS: And Im Faith Lapidus. Today, we will tell about an effort to learn what happened to American pilot Amelia Earhart. We will tell about a grou

发表于:2019-01-11 / 阅读(80) / 评论(0) 分类 2011年VOA慢速英语(一)月

It seems like from the time we are very young women are affected in some way by the monthly cycle. For young girls it is through our older sisters, cousins, aunts, and female relatives where we see the effects of menstruation, in how they change thei

发表于:2019-01-17 / 阅读(159) / 评论(0) 分类 实用英语

Chapter 21 第12章 Dirk Stroeve agreed to fetch me on the following evening and take me to the cafe at which Strickland was most likely to be found. 戴尔克施特略夫答应第二天晚上来找我,带我到一家多半会找到思特里克兰德

发表于:2019-02-13 / 阅读(48) / 评论(0) 分类 月亮和六便士