He says it is important to get young people involved in volunteer work at an early age.

VOA: special.2009.07.01

I have to tell you that Levi-Strauss, who is still alive, a very old man, expresses great bitterness in his old age about what he takes to be the displacement of the importance of his own work by what happened subsequently.

现在列维仍然在世，年事已高，晚年他表达了,自己对作品的重要性,后来被取代的痛苦。

耶鲁公开课 - 文学理论导论课程节选

From an early age, Aleck liked to make new things and find new ways of doing work.

VOA: special.2010.05.14

At the age of fifteen, he left school and went to work in the music business.

VOA: special.2009.02.08

On an average day, nearly everyone fifteen years of age and older took part in a non-work activity like watching television, socializing or exercising.

VOA: special.2011.07.22

To his friends,family and colleagues, Norman Borlaug was a marvel, continuing to work on agricultural projects and academic pursuits as he reached the age of 95.

VOA: standard.2009.09.13

The scientists say if their work is confirmed, it could lead to further research on how lifestyle choices figure in the prevention and treatment of age-related decline and diseases such as Alzheimer's.

VOA: standard.2009.12.30

Richard Milner is working on his next book,which explores the art of Charles R.Knight, the American painter of dinosaurs, ice age mammoths and saber-toothed cats, whose work adorns the walls of the American Museum of Natural History in New York, the Field Museum in Chicago and other institutions.

VOA: standard.2009.11.25