The new findings involved more than five thousand people in the second generation of the Framingham Heart Study.

VOA: special.2010.01.06

Now when it reaches up to the right more towards the heart of that red zone, " 100 spikes per second.

现在，当它移动到,右上侧偏红色区域的时候，我们会听到嗑哩的声音，每秒钟100次，we，may，hear，“keri…

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

A new study has found that teenagers who are exposed to second-hand tobacco smoke are more likely to have damaged to their blood vessels that could lead to heart disease later in life.

VOA: standard.2010.03.04