Keeping bones strong with exercise may also help prevent fractures, especially if you wear the right sports protection during activities.

VOA: special.2009.02.04

But one thing we can do is tell you where leadership may help.

可至少能知道它在什么场合有用武之地

耶鲁公开课 - 博弈论课程节选

They will prevent sickness, help you feel better and may even save your life.

VOA: special.2010.07.27

The technique may also help doctors predict whether you're likely to get a disease, decades before the symptoms show up.

VOA: standard.2010.07.14