VOA标准英语2008年-Study Shows Ultrasound Screening, Mammograms Ne

By Carol Pearson
Washington
14 May 2008
 

Doctors say mammography is the best way to find breast cancer before it gets a chance to spread.  But mammograms can miss some cancers, especially for women with dense¹ breast tissue. Now, a new study shows for these women, combining a mammogram with a screening ultrasound increases the chances of finding cancer early and saving lives. VOA's Carol Pearson has more.

1 dense   

a.密集的，稠密的，浓密的；密度大的

参考例句：

• The general ambushed his troops in the dense woods. 将军把部队埋伏在浓密的树林里。
• The path was completely covered by the dense foliage. 小路被树叶厚厚地盖了一层。