官方APP下载:英语全能特训(微信小程序版,支持苹果手机、安卓手机)
创办于2003年
UNSV记不住?那就记中文谐音“忧安思危”吧!
  Slow and Steady Wins the Race!
UNSV英语学习频道 - Slow and steady wins the race!
公众微信服务号
英语全能特训(微信公众服务号)
UNSV英语学习频道淘宝网店
客服短信:18913948480
客服邮箱:web@unsv.com
初级VIP会员
全站英语学习资料下载。
¥98元/12个月

HEALTH REPORT - Conjoined Twins

阅读次数:


VIP会员专享下载:(非VIP会员无权下载!如果想下载,但还不是VIP会员,请点此订购
下载方式:使用鼠标右键(注意是鼠标右键!)点击下面的MP3音频/MP4视频链接,然后选择“另存为…”。
PDF节目文稿 PDF节目文稿  MP3节目录音 MP3节目录音 
文章正文
同步字幕

This is Phoebe Zimmerman with the VOA Special English Health Report.

Some estimates say that one in as many as eighty-thousand of all births results in two babies joined together. Conjoined twins happen about once out of every two-hundred births of identical twins.

Some twins develop from two separate eggs that are fertilized at the same time. These babies are called fraternal twins. One can be a girl and the other a boy.

Other twins develop from a single egg. These are called identical twins. Identical twins result when a fertilized egg divides into two.

Sometimes the division begins but is not completed. This produces twins who are physically linked. Medical experts say genetic and environmental influences are involved in the development of conjoined twins.

Graphic Image
Graphic Image

Recent separations have taken place in Britain, Singapore, Italy, Australia and the United States. These included an operation where doctors at the Children's Medical Center in Dallas, Texas, separated two Egyptian boys joined at the head.

Conjoined twins may be linked only by a thin piece of tissue. Or they may be attached at the chest or other part of the body. Sometimes they share a heart or other internal organ.

In the past, conjoined twins were called Siamese twins. This was because the first well-known twins were born in Siam, the country now called Thailand. Chang and Eng were born in eighteen-eleven. A twelve-centimeter-long ligament near their breastbones connected them. Chang and Eng grew up, married and had a total of twenty-one children. The two men died in eighteen-seventy-four.

Historically, the survival rate for conjoined babies has been between five and twenty-five percent. But medical progress has increased those chances.

Today, most conjoined twins are found during examinations before they are born. Some are easier to separate than others.

The book "Entwined Lives" by Nancy Segal says doctors have performed about two-hundred operations to separate conjoined twins. Ninety percent have taken place since nineteen-fifty. The book says most of the operations resulted in the survival of at least one of the babies.

One Web site where you can learn more about conjoined twins is twinstuff-dot-com.

This VOA Special English Health Report was written by Nancy Steinbach. This is Phoebe Zimmermann.

网友的学习评论(0条):
版权所有©2003-2019 南京通享科技有限公司,保留所有权利。未经书面许可,严禁转载本站内容,违者追究法律责任。 互联网经营ICP证:苏B2-20120186
网站备案:苏ICP备05000269号-1中国工业和信息化部网站备案查询
广播台