The National Longitudinal Survey of Youth 1997 interviewed people between the ages of 13 and 17 in 1997 and continues to interview the same people each year since then.

国家青年跟踪调查组织在1997年采访了处于13到17岁年龄段之间的人群，并且之后每年都跟踪采访调查对象。

youdao

Over half of new HIV infections worldwide are occurring among young people between the ages of 15 and 24, and more than 60 per cent of HIV-positive youth in this age bracket are female.

全世界HIV的新增感染者中有一半是15 - 24岁的年轻人，该年龄段HIV检测阳性的年轻人中有60%是女性。

youdao

The products will be available for three youth categories: ages 3-6, 6-9 and 9-12.

新产品系列将会为三个年龄层准备，3-6岁，6-9岁以及9-12岁。

youdao

More than 3 million players in the US, from the ages of 5 to 19, are registered in youth football programs and that number is rising.

VOA: standard.2010.06.15

It's open to at-risk youth ages 16 to 22, many of whom are referred by social workers or probation officers.

CNN: Troubled youth kicking it 'old skool' at San Fran bistro

After Britain raised the minimum sale age to 18 from 16 in 2007, there was a 30% decline in smoking among youth ages 16 to 17, according to statistics provided by City Hall.

WSJ: City to Raise Age Limit On Tobacco Sales

Spokeswoman Rachel Scott said the U.S. component comprises about 150 adult volunteers and 350 youth scouts, ages 3-18, in 45 circles and hearths.

WSJ: Amid Boy Scout turmoil, other groups hope to grow