染色体嵌合体（同一个体的细胞群中有不同的染色体数或核型者）

AMERICAN MOSAIC

AMERICAN MOSAIC By Broadcast: Friday, January 30, 2004 (THEME) HOST: Welcome to AMERICAN MOSAIC -- a program in VOA Special English about music and American life. And we answer your questions. (THEME)

发表于:2018-12-07 / 阅读(151) / 评论(0)

American Mosaic

AMERICAN MOSAIC - When It Ain't Right to Use 'Ain't' in Engl

AMERICAN MOSAIC - When It Ain't Right to Use 'Ain't' in English, and When It Is By Dana Demange and Nancy Steinbach Broadcast: Friday, December 16, 2005 (MUSIC) HOST: Welcome to AMERICAN MOSAIC, in VO

发表于:2019-01-02 / 阅读(168) / 评论(0)

American Mosaic

The extinction of men

Neil: Hello and welcome to Six-Minute English from BBC Learning English, I'm Neil and with me today is Rosie. Rosie: Hi there. Neil: Well, today we're talking about men. Rosie: That sounds interesting. Neil: It is very interesting especially if you'r

发表于:2019-01-07 / 阅读(100) / 评论(0)

六分钟英语

2005年NPR美国国家公共电台九月-Scientists: Male Chromosome Won't Lead to

Scientists at the Whitehead Institute in Cambridge, Massachusetts say it's fortunate for humans that the Y chromosome is not on the verge of extinction. That's because the Y is the chromosome that makes males males. The outlook is less favorable for

发表于:2019-01-08 / 阅读(151) / 评论(0)

2005年NPR美国国家公共电台

VOA慢速英语2010年-Health Report - Study Finds No Reason

This is the VOA Special English Health Report. A miscarriage is the natural loss of a pregnancy before the twentieth week. This happens to as many as twenty percent of known pregnancies. Experts say many pregnancies end before a woman even knows she

发表于:2019-01-11 / 阅读(49) / 评论(0)

2010年VOA慢速英语(八)月

这些健康新知识你了解多少

1 Compared with conventional beef, grass-fed beef is higher in this health-promoting nutrient, which gives its fat a yellow color: 1、与传统牛肉相比，草饲牛肉中某种有益健康的营养素含量更高，并让脂肪呈现黄色，这种

发表于:2019-02-18 / 阅读(87) / 评论(0)

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学英语单词

achmat

adult-themed

aesthesioneuroblastoma

ambivalence, ambivalency

anteromedial central branches

anti-vivisections

archlute

automatic bag filling and closing machine

avays

bank advance

be comfortable with